Download S260-75-1

Oil- and Vacuum-Break
Switches
Service Information
Type S Automatic Load-Transfer Control
Installation, Operation, and Maintenance Instructions
S260-75-1
Before Placing the Control and Switchgear
in Service............................................................................6
Equipment Required...........................................................6
Customer Connections.......................................................8
Interconnecting Cables.....................................................13
Operating Instructions..........................................................16
Initial Operation................................................................16
Normal Operation.............................................................17
Theory of Operation—Basic S Control................................17
Figure 1.
Type S automatic load-transfer control.
Voltage Sensing................................................................17
Automatic Transfer, Preferred to Alternate.......................18
Return Transfer, Parallel Transition...................................18
Return Transfer, Non-Parallel Transition...........................18
No Preference Mode........................................................19
Preferred Source II Mode.................................................19
Control Mode Switch, S5.................................................19
Manual Control.................................................................19
Indicating Lamps..............................................................19
Remove the Control from Service....................................20
Troubleshooting—Basic S Control......................................20
General.............................................................................20
Basic Troubleshooting......................................................20
Contents
Advanced Troubleshooting...............................................21
Safety Information .................................................................2
Fault Block Accessory..........................................................28
Hazard Statement Definitions . ..........................................2
General Description..........................................................28
Safety Instructions..............................................................2
Accessory Settings...........................................................28
Product Information................................................................3
Operating Instructions......................................................29
Introduction........................................................................3
Theory of Operation—Fault Block Accessory..................29
Acceptance and Initial Inspection......................................3
Overcurrent Sensing.........................................................29
Handling and Storage.........................................................3
Phase Fault Operation......................................................29
ANSI Standards..................................................................3
Ground Fault Operation....................................................32
Quality Standards...............................................................3
Reset Circuits...................................................................32
Description of Operation....................................................4
Inrush Restraint Feature...................................................32
Time Delay Selection..........................................................4
Testing Fault Block Operation..........................................33
Pre-Installation Check............................................................5
Returning the Control to Service......................................35
Pre-lnstallation....................................................................5
Wiring Tables.........................................................................36
Installation Instructions..........................................................6
Replacement Parts...............................................................40
Initial Programming.............................................................6
Front Panel—Replacement Parts List..............................41
Mounting the Control..........................................................6
Back Panel—Replacement Parts List...............................42
Grounding the Control........................................................6
Fault Block Accessory—Replacement Parts List.............43
October 2008 • Supersedes 10/02
Printed in U.S.A.
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
!
SAFETY
FOR LIFE
SAFETY FOR LIFE
!
SAFETY
FOR LIFE
Cooper Power Systems products meet or exceed all applicable industry standards relating to product safety. We actively
promote safe practices in the use and maintenance of our products through our service literature, instructional training
programs, and the continuous efforts of all Cooper Power Systems employees involved in product design, manufacture,
marketing, and service.
We strongly urge that you always follow all locally approved safety procedures and safety instructions when working around
high voltage lines and equipment and support our “Safety For Life” mission.
SAFETY INFORMATION
The instructions in this manual are not intended as a
substitute for proper training or adequate experience
in the safe operation of the equipment described.
Only competent technicians who are familiar with this
equipment should install, operate, and service it.
Safety Instructions
Following are general caution and warning statements that
apply to this equipment. Additional statements, related to
specific tasks and procedures, are located throughout the
manual.
A competent technician has these qualifications:
• Is thoroughly familiar with these instructions.
• Is trained in industry-accepted high- and low-voltage
safe operating practices and procedures.
• Is trained and authorized to energize, de-energize,
clear, and ground power distribution equipment.
• Is trained in the care and use of protective
equipment such as flash clothing, safety glasses,
face shield, hard hat, rubber gloves, hotstick, etc.
Following is important safety information. For safe
installation and operation of this equipment, be sure to
read and under­stand all cautions and warnings.
DANGER: Hazardous voltage. Contact with
hazardous voltage will cause death or severe
personal injury. Follow all locally approved safety
procedures when working around high- and lowvoltage lines and equipment. G103.3
WARNING: Before installing, operating, maintaining, or testing this equipment, carefully read and
understand the contents of this manual. Improper
operation, handling or maintenance can result in death,
severe personal injury, and equipment damage. G101.0
Hazard Statement Definitions
This manual may contain four types of hazard
statements:
DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING: Indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result
in minor or moderate injury.
CAUTION: Indicates a potentially hazardous
situation which, if not avoided, may result in
equipment damage only.
WARNING: This equipment is not intended to
protect human life. Follow all locally approved
procedures and safety practices when installing or
operating this equipment. Failure to comply can result
in death, severe personal injury and equipment damage.
G102.1
WARNING: Power distribution and transmis-
sion equipment must be properly selected for
the intended application. It must be installed and
serviced by competent personnel who have been
trained and understand proper safety procedures.
These instructions are written for such personnel and
are not a substitute for adequate training and experience in safety procedures. Failure to properly select,
install, or maintain power distribution and transmission
equipment can result in death, severe personal injury,
and equipment damage. G122.3
!
S260-75-1
SAFETY
FOR LIFE
PRODUCT INFORMATION
Introduction
Handling and Storage
Service Information S260-75-1 provides installation,
operation, and maintenance instructions for the Type S
automatic load-transfer control.
Use care during handling and storage of the control. If
the control is to be stored for any length of time prior to
installation, provide a clean, dry storage area to minimize
the possibility of mechanical damage.
Read This Manual First
Read and understand the contents of this manual and
follow all locally approved procedures and safety practices
before installing or operating this equipment.
ANSI Standards
Kyle reclosers are designed and tested in accordance with ANSI
standards C37.60 and C37.85 and ANSI guideline C37.61.
Additional Information
Quality Standards
These instructions cannot cover all details or variations in
the equipment, procedures, or processes described, nor
provide directions for meeting every possible contingency
during installation, operation, or maintenance. For
additional information, contact your Cooper Power
Systems representative
ISO 9001:2000-Certified Quality Management System
Acceptance and Initial Inspection
Each Type S control is completely assembled, tested, and
inspected at the factory. It is carefully calibrated, adjusted,
and in good condition when accepted by the carrier for
shipment.
Upon receipt, inspect the carton for signs of damage. Unpack the control and inspect it thoroughly for damage
incurred during shipment. If damage is discovered, file a
claim with the carrier immediately.
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
Description of Operation
The Type S control is designed for use primarily with Kyle
Type VR, VLR, VRV, TSC, and C three-phase, load-break
switches in automatic load-transfer schemes. In a typical
scheme, service to a critical load is normally supplied
from a preferred source. It is automatically switched to an
alternate, standby source if the preferred source voltage
is lost for any reason for a preset period of time. Upon
restoration of the preferred source voltage, the load is
automatically switched back to the preferred source,
again after a predetermined time delay.
Typical Automatic Load-transfer
Sequence using the Type S Control
• The load is transferred to the alternate source after a
preset time delay, when the preferred source voltage
is lost and normal voltage is present on the alternate
source. Either Source I or Source II can be selected
as the preferred source by a setting on the SOURCE
PREFERENCE Switch, S4.
• The load is transferred back to the preferred source—
after another preset time delay—when normal
voltage is restored to the preferred source. The return
transfer (from Source II to Source I) can be either
non-parallel (alternate-source switch opens before
preferred-source switch closes) or parallel (preferredsource switch closes before alternate-source switch
opens). With parallel return the second interruption
is eliminated; however, both sources must be in
synchronism. The return transfer mode is selected by
a setting on the SOURCE PREFERENCE switch, S4.
Variations in the Operation
of the Type S Control
• No-Preference Operation. When either source
is acceptable for continuous critical load supply.
Upon loss of Source I voltage—and after a preset
time delay—the load is automatically transferred
to Source II, provided normal voltage is present on
Source II. However, the load is not transferred back
to Source I when voltage is restored, but remains on
Source II until such time as Source II voltage is lost.
Then an automatic nonparallel transfer to Source I
is performed. (Accomplished by setting SOURCE
PREFERENCE switch, S4, to NO PREF position.)
• Hold on Alternate Source. When placed to the
HOLD ON ALTERNATE position, the S control will
not automatically return to the preferred feeder. If
the preferred feeder is energized, the S control can
be manually transferred to the preferred feeder by
momentarily moving S3 to the NORMAL position.
IMPORTANT: If Control Mode Switch S3 is placed in
the “AUTO” position, the S-control will place the highvoltage transfer switches into the configuration that is
currently selected by the Source Preference Switch
S4. This may result in an unintended transfer. Make
sure the desired state of the high-voltage transfer
switches match the setting of S4 before returning S3
to the “AUTO” position.
• Manual Operation of the S control. The Source I
and Source II high-voltage switches can be opened
and closed independently to effect manual transfer
from one source to the other. (Accomplished by
setting OPERATION SELECTOR switch, S3, to
MANUAL and operating MANUAL OPER. SOURCE
I (S1) and MANUAL OPER. SOURCE II (S2) switches
as required.)
In addition, a factory-installed fault block accessory will
Block Transfer if loss of voltage is due to a fault on the load
side of the high-voltage switches. When preferred source
voltage is lost (due to the opening of the backup protective
device)—and after the preset time delay—the preferred
source switch will open and the fault block accessory will
disable the S control to prevent closing either high-voltage
switch into the fault. The S control must be manually reset
before service to the load can be restored. The fault block
option is a factory-installed accessory. The accessory is
activated by over-current signals supplied by load-sensing
current transformers built into special factory-modified
Type VR, VLR, VRV, TSC, and CS high-voltage switches.
It is also compatible with the PST-6 switchgear. The PST-9
switchgear does not require fault block.
Time Delay Selection
The time delay setting for preferred to alternate source
transfer must be long enough to allow discrimination
between permanent loss of voltage and temporary loss
of voltage due to transient effects or reclosing intervals
of backup protective reclosers or breakers. The timedelay required to override reclosing intervals is difficult
to determine since voltage may be subnormal during the
retarded timing operations of the backup device due to
the presence of the fault. It is recommended that the time
delay before transfer from preferred to alternate source is
set to exceed the maximum cumulative time to lockout of
the backup protective device. This approach assures that
the transfer switch will not interrupt the current of a fault
occurring on the load side of the switch.
The time delay for return from alternate to preferred source
upon restoration of preferred source voltage should be
set for an interval long enough to assure that service on
the preferred source has been permanently restored.
When the control is programmed to operate in the “nopreference” mode, there are no preferred or alternate
sources. Time delay intervals for transfer from Source I
to Source II are governed by the left-hand Preferred to
Alternate timer and for transfer from Source II to Source I
by the right-hand Alternate to Preferred Timer. Settings of
the two timers may be different because of difference in
backup protection on the two sources.
!
S260-75-1
SAFETY
FOR LIFE
Pre-Installation
PRE-INSTALLATION CHECK
WARNING: This equipment is not intended to
protect human life. Follow all locally approved
procedures and safety practices when installing or
operating this equipment. Failure to comply can result
in death, severe personal injury and equipment damage.
G102.1
is in the CLOSE position there should be 120 Vac
between terminal 15 of TB1 and ground. Similarly, when
MANUAL OPER. SOURCE II switch (S2) is in the CLOSE
position there should be 120 Vac between terminal 25
of TB1 and ground.
5. To check the response of the latching relay to
automatic operation, proceed as follows:
A. Set OPERATION SELECTOR switch (S3) to AUTO.
WARNING: Hazardous voltage. Never rely on
the open position of the operating handle or the
contact position indicator; it does not ensure that the line
is denergized. Follow all locally approved safety practices. Failure to comply can result in contact with high voltage,
which will cause death or severe personal injury. G123.1
The Type S automatic load-transfer control is programmed
to customer’s specifications and thoroughly tested
before shipment from the factory. Perform the following
pre-installation test setup and procedure to verify the
operation of the standard S control.
Note: This procedure does not test complete control operation.
This can be done only on a complete installation basis
with the S control operating the high-voltage transfer
switches.
Test Set–up
1. Connect a 120 Vac, 60 Hz power supply to terminals
Z and G2 of TB2 being absolutely certain that the
grounded side of the power supply is connected to
G2.
2. Jumper terminal Z to Y to X to C to B to A.
3. When the 120 Vac power supply is turned on, all six
phases are energized.
4. To simulate loss of voltage on any phase of either
source, simply unscrew the appropriate fuse “FU” in
the control.
Test Procedure
1. Check the indicating lamps by depressing the LAMP
TEST switch (S6). All lamps on the front panel of the
control (including fault block accessory if installed)
should light with equal brilliance.
2. With phase Y and/or phase B energized, terminals 11
and 21 of TB1 will always show 120 Vac to ground
(G1 or G2).
3. With OPERATIONS SELECTOR switch (S3) set to
MANUAL, terminal 13 of TB1 will respond to the
operation of MANUAL OPER. SOURCE I switch
(S1) showing 120 Vac to ground when S1 is in the
open position and 10 Vac, or less, when S1 is in the
OFF and CLOSE positions. Terminal 23 of TB1 will
show similar voltages to ground in response to the
operation of MANUAL OPER.
4. When MANUAL OPER. SOURCE I switch (S1)
B. Select the desired source preference and return
mode with switch S4.
C. After waiting for a time in excess of the maximum
transfer delay timer setting (to make sure the
control is at rest), simulate a “lost” phase by
unscrewing one of the preferred source fuses.
Listen for relay clatter to recognize breaking the
circuit.
D. As soon as phase voltage is lost, the PREFERRED
TO ALTERNATE TIMER will start to run. Verify the
LED timer is illuminated during operation.
E. When timing is complete, the latching relay (R1)
will operate. Its position can be checked by the
presence of 120 Vac at test terminals T-1 or T-2
on the front panel. 120 Vac between T-2 and T3 (ground) means the latching relay has moved
to that position which would connect the load to
Source II if HV switches were connected to the
control. 120 Vac at T-1 means the load would be
connected to Source I.
F. Replace the removed fuse to restore preferred
source power, observe operation of the ALTERNATE TO PREFERRED TIMER, and check the
status of the latching relay (R1) when timing is
completed.
Note: SOURCE PREFERENCE switch S4 cannot be in NO
PREF position for this test.
G. Other modes of transfer can be checked by
programming the control for the desired sequence,
simulating loss of source voltage, observing
resultant control operation, and checking the final
position of the latching relay (R1).
6. Timer settings can be verified with a watch while
performing the checks in preceding Step 5.
7. Switch I and Switch II position indicating lamps will
not operate during this preinstallation check since
the high-voltage transfer switches are not connected
to the control.
Their operation can be verified by connecting
a 100 ohm, 1 watt, resistor from TB1 terminals to ground as follows:
SWITCH I OPEN lamp—terminal 15 to ground
SWITCH I CLOSED lamp—terminal 24 to ground
SWITCH II OPEN lamp—terminal 25 to ground
SWITCH II CLOSED lamp—terminal 14 to ground
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
INSTALLATION INSTRUCTIONS
A typical automatic transfer scheme is illustrated
in Figure 2.
Initial Programming
The control must be programmed with all necessary
operating settings prior to operation with energized
switchgear. For the desired settings refer to the Operating
Instructions section in this manual.
Mounting the Control
Mount the S control in a convenient, accessible location.
Maximum distances between the high-voltage transfer
switches and potential sensing transformers and the
control depends upon the size of the control cable wire
and the length of various cable combinations. (See the
Interconnecting Cables section in this manual.) Keep in
mind that the longer the cable lengths, the greater the
susceptibility to surge damage. Therefore, for optimum
reliability and economy, locate the switches and
transformers as near as possible to the control.
Mounting dimensions are provided in Figure 3.
• For pole-mounted installation, a hole and keyway in
the control mounting bracket accommodates a 5/8”
bolt.
• For substation installation, the control is factory
installed. Leveling is not required.
Grounding the Control
Warning: Hazardous voltage. Solidly ground all
equipment. Failure to comply can result in death,
severe personal injury, and equipment damage.
T223.2
The control cabinet must be grounded. A grounding
connector on the underside of the cabinet will
accommodate No. 14 solid through No. 4 stranded
conductors.
For effective surge protection all control and power
conductors for the S control must be routed parallel to a
corresponding ground path. For example, the AC power
supply for the control should be parallel to and equal in
length to the transformer ground path. The control cable
should be parallel to and routed close to the switchgear
ground path.
Before Placing the Control and
Switchgear into Service
CAUTION: Equipment misoperation. Do not
energize this equipment until all control settings
have been properly programmed and verified. Refer to
the Control Programming and Operation section of this
manual for programming procedures. Failure to comply
can result in misoperation (unintended operation),
equipment damage, and personal injury.
G118.1
Prior to placing the control and switchgear into service,
the following installation procedures must be properly
completed and verified:
1. Control properly mounted for the installation.
2. Equipment installed according to all locally approved
standards and practices.
3. Control and switchgear properly grounded in
accordance with guidelines in this manual.
4. AC power connected to the control.
5. All control programming entered and verified by
appropriate personnel.
Equipment Required
The following equipment is required for a load-transfer
installation:
Type S Load-Transfer Control
The control, with or without the fault block accessory,
is housed in a cabinet whose outline and mounting
dimensions are shown in Figure 3. The control cabinet can
be mounted on a pole or substation structure. Leveling is
not required. Both the cabinet door and the hinged front
panel are equipped with hold-open latches to prevent
them from swinging in the open position.
Motor Operated Switches
The three-phase, load break switches require a special
wiring accessory for operation with the Type S control.
In addition, if fault block is provided, the switches must
be equipped with 1000:1 ratio current transformers also
available as a factory-installed switch accessory. See
the switch installation manual for overall and mounting
dimensions and for wiring diagrams.
Potential Transformers
Three-phase voltage sensing is required for control
operation. Transformer connections and voltages for
various distribution system connections are shown in
Figure 5. The voltage sensing relays of the Type S control
drop out on a decreasing voltage at 75 volts (min) and
pick up on an increasing voltage at 97 volts (max). The
control requires 120 Vac, 60 Hz, 500 VA (min) to operate
the transformer switches. Quiescent power dissipation at
120 Vac is 18 watts.
!
S260-75-1
SAFETY
FOR LIFE
LOAD
SOURCE I
H.V.
SWITCH
II
H.V.
SWITCH
I
SOURCE II
POTENTIAL
SENSING
TRANSFORMERS
POTENTIAL
SENSING
TRANSFORMERS
TYPE
S
CONTROL
Figure 2.
Typical Type S control load-transfer scheme.
12 13/16"
MTG HOLES (2) FOR
5/8" MAX BOLT DIA
16"
8"
1 1/2"
20 1/8"
MTG DIM
17 7/8"
22 5/32"
5/8" HOLE PROVIDED
FOR CUSTOMER LOCK
GROUNDING
TERMINAL LUG
(14 TO 4 STRANDED)
13 1/2"
2 1/2" 2 1/2"
1 1/2"
11"
1 1/2"
1 3/16"
2 1/2" 2 1/2"
STD CONTROL
Figure 3.
Outline and mounting dimensions.
1 5/8" DIA HOLES
5 1/4"
CONTROL WITH FAULT BLOCK
TABLE 1
Reaction and Transition Times of Cooper Power Systems Motor-Operated Switches
Direction of
Transfer
First Switch
Transition
(Source to
Switch
Reaction Time*
Time**
Source)
VR, VLR, VRV (standard)
2.5 to 3.5 cycles 10 sec (approx)
I to II
VR, VLR, VRV (standard)
2.5 to 3.5 cycles 10 sec (approx)
II to I
VR, VLR, VRV (standard)
10 sec (approx)
1.0 to 1.5 cycles
II to I
VR, VLR, VRV (quick close) 2.5 to 3.5 cycles 6 to 7 cycles
I to II
VR, VLR, VRV (quick close) 2.5 to 3.5 cycles 6 to 7 cycles
II to I
VR, VLR, VRV (quick close) 4.0 to 5.5 cycles 1.0 to 1.5 cycles
II to I
TSC
7 to 8 sec
7 to 8 sec
I to II
TSC
7 to 8 sec
7 to 8 sec
II to I
TSC
7 to 8 sec
7 to 8 sec
II to I
PST-6, PST-9
2.0 to 3.0 cycles 5.0 to 6.0 cycles
I to II
PST-6, PST-9
2.0 to 3.0 cycles 5.0 to 6.0 cycles
II to I
PST-6, PST-9
5.0 to 6.0 cycles 2.0 to 3.0 cycles
II to I
Type of Transition
No paralleling of sources
No paralleling of sources
Paralleling of sources on return to preferred source
No paralleling of sources
No paralleling of sources
Paralleling of sources on return to preferred source
No paralleling of sources
No paralleling of sources
Paralleling of sources on return to preferred source
No paralleling of sources
No paralleling of sources
Paralleling of sources on return to preferred source
* Time from expiration of time delay to first opening (or closing) of high-voltage switch. Add approximately one cycle to the values shown to allow for Type S control
relay operating time.
** Time-load tap is disconnected or paralleled depending on type of transition used.
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
LOAD
C
A
SOURCE
D
H.V.
SWITCH
H.V.
SWITCH
FEEDER
B
S
CONT
Phase Voltage at the Three-Phase Sensing Type S Load Transfer Control as Related to System and Sensing Transformer Connections
%
* Assuming no feedback from the load
** Bank operates open wye-delta; requires two primary phases open for sensing
† Voltage may vary from 87 to 58% depending on load
Figure 4.
Phase voltage at the three-phase sensing Type S load-transfer control.
Customer Connections
Connection Diagram
CAUTION: Equipment damage. Do not drill connection
holes into the top of the cabinet. Connection holes in the
top of the cabinet will allow moisture to seep into the
control and damage the components or cause control
misoperation. Failure to comply will void the control’s
factory warranty. T249.0
Diagrams for interconnecting the load-transfer control
with the high-voltage switches and potential transformers
are shown in Figures 5 through 8. The diagrams show
the internal wiring between the terminal blocks and the
input and output receptacles on the control (available
as an accessory) and the external wiring between the
control, transfer switches, and potential transformers. If
the control is not equipped with the plugs and receptacles
accessory, the cables are wired directly to the terminal
blocks in the control. For the physical location of terminal
blocks, refer to Figure 27.
Note: Internally wired receptacles and mating plugs for the
switch operators and current sensing transformers on the
switch end of the cables are provided as standard with
the switches.
POTENTIAL
SENSING
TRANSFORMERS
500 VA MIN
120 VAC, 60 HZ
SECONDARIES
TRIP
OPEN
COIL
2 1
SEE INSERT
FOR INTERNAL
CONNECTIONS
A B CD EF
A B CD E F
"SW"
GRN
AA
B B WHT
RED
C C BLK
D D ORG
E E BLU
FF
INTERNAL CONNECTION DIAGRAM:
QUICK CLOSE SWITCH OPERATOR
MOTOR
A B C G1G2 X Y Z
POTENTIAL SENSING
TRANSFORMERS
FAULT BLOCK ACCESSORY
17 18 IA IB IC IN IN IX IY IZ 27 28
GRN A A "PT"
RED B B
BLK C C
WHT D D
EE
"CT"
GRN A A
RED B B
BLK C C
YEL D D
ORG E E
BLU F F
GG
HH
J J
KK
WHT
"SW"
GRN A A
WHT B B
RED C C
BLK D D
ORG E E
BLU F F
A B C D E F GH
A B C D E F GH
MOTOR
AB CDEF
INTERNAL CONNECTION DIAGRAM:
STANDARD SWITCH OPERATOR
0 1 G 2 3 4
SELECTOR
SWITCH
TRIP OPEN COIL
FACTORY-WIRED RECEPTACLE
AND PLUG ACCESSORY KCN55SB
(IF ACCESSORY IS NOT SPECIFIED
WIRE SWITCH CONTROL DIRECTLY
TO TB1, PT'S TO TB2 AND CT'S TO TB5.)
AB CD EF
A B CD E F
!
ABCDEF
0 1 G 2 3 4
QUICK
CLOSE
COIL
"CT"
GRN
AA
B B RED
C C BLK
YEL
D D ORG
E E BLU
FF
GG
HH
NOTE: FOR SINGLE-PHASE SENSING J J
JUMPER TERMINAL A TO B TO C AND K K
WHT
TERMINAL X TO Y TO Z ON TB2
"PT"
A A GRN
B B RED
C C BLK
D D WHT
EE
SELECTOR SWITCH
A B C D E F GH
A B C D E F GH
S CONTROL
TRANSFER SWITCH OPERATORS
11 15 14 13 16 G1G2 26 23 24 25 21
POTENTIAL
SENSING
TRANSFORMERS
500 VA MIN
120 VAC, 60 HZ
SECONDARIES
Z
AUX.
SW "a"
CONTACT
(STAGE1)
2 1
X
SOURCE II
N
C
RECEPTACLES AND PLUGS
FURNISHED WITH KA217VR
WIRING ACCESSORY
TYPE VR, VLR, OR VRV
SWITCH WITH KA217VR
WIRING ACCESSORY
Y
SEE INSERT FOR
INTERNAL
CONNECTIONS
AUX. SW "a"
CONTACT (STAGE1)
LOAD TAP
B
SOURCE I
A
N
TYPE VR, VLR, OR VRV
SWITCH WITH KA217VR
WIRING ACCESSORY
SOURCE I AND SOURCE II MUST
PRESENT THE SAME PHASE
ROTATION TO THE LOAD.
SAFETY
FOR LIFE
S260-75-1
Figure 5.
Connection diagram for Type S load-transfer control (with fault block accessory) operating a Type VR, VLR, or
VRV three-phase switch. (The transformer cutouts, tap fuses, reclosers, and arresters are not shown.)
POTENTIAL
SENSING
TRANSFORMERS
500 VA MIN
120 VAC, 60 HZ
SECONDARIES
C
B
SOURCE I
A
N
A B CD E F
A B CD E F
a1 b1
"SW"
AA
BB
CC
DD
EE
FF
RECEPTACLE AND PLUG
FURNISHED WITH KA5TSC1
WIRING ACCESSORY
GRN
WHT
RED
BLK
ORG
BLU
A B C G1 G2 X Y Z
POTENTIAL SENSING
TRANSFORMERS
GRN A
A
WHT B B
RED C C
BLK
D
ORG D
EE
BLU F F
TB1
"SW"
MM
ABC DE F GH
ABC DE F GH
a1
FACTORY-WIRED RECEPTACLE
AND PLUG ACCESSORY KCN55SB
(IF ACCESSORY IS NOT SPECIFIED,
WIRE SWITCH CONTROLS DIRECTLY
TO TB1, PT'S TO TB2, AND CT'S TO TB5.)
AB C D EF
AB C D EF
a1 b1
a1 b 1
TYPE TSC SWITCH
WITH KA5TSC1 CT ACCESSORY
GRN A A "PT"
RED B B
BLK C C
WHT D D
EE
GRN A A
RED B B
BLK C C
YEL D D
ORG E
BLU E
FF
GG
HH
JJ
KK
TB2 WHT
FAULT BLOCK ACCESSORY
17 18 IA IB IC IN IN IX IY IZ 27 28
S CONTROL
TRANSFER SWITCH OPERATORS
11 15 14 13 16 G1 G226 23 24 25 21
"CT"
A A GRN
B B RED
C C BLK
D D YEL
E E ORG
F F BLU
GG
NOTE: FOR SINGLE-PHASE SENSING H H
JUMPER TERMINAL A TO B TO C AND J J
KK
TERMINAL X TO Y TO Z ON TB2
WHT
"PT"
A A GRN
B B RED
C C BLK
D D WHT
EE
ABC DE F GH
ABC DE F GH
a2
M
CLOSE
OPEN
LOAD TAP
OPEN
TYPE TSC SWITCH
WITH KA5TSC1 CT ACCESSORY
CLOSE
10
CLOSE
OPEN
POTENTIAL
SENSING
TRANSFORMERS
500 VA MIN
120 VAC, 60 HZ
SECONDARIES
Z
Y
X
SOURCE II
N
SOURCE I AND SOURCE II MUST
PRESENT THE SAME PHASE
ROTATION TO THE LOAD.
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
Figure 6.
Connection diagram for Type S load-transfer control (with fault block accessory) operating the Type TSC three-phase switch.
(The transformer cutouts, tap fuses, reclosers, and arresters are not shown.)
"SW"
L L
MM
NN
PP
RR
SS
TT
UU
VV
TB5
"SW"
TRIP
COIL
SEE INSERT
FOR INTERNAL
CONNECTIONS
NC = NORMALLY
CLOSED
NO = NORMALLY
OPEN
M = MOTOR
R = RESISTOR
KEY:
TRIP
COIL
CLOSE
COIL
"PT"
EE
FF
GG
HH
LS3 LS2
(NC) (NO)
LS2
(NC)
LS4 M
(NO)
LS3 LS1
(NO) (NC)
INTERNAL CONNECTION DIAGRAM:
C-INTERRUPTER # 1
R
LS4
(NC)
CLOSE
COIL
INTERNAL CONNECTION DIAGRAM:
C-INTERRUPTER # 2
A B C D E F G H J K
R
TB2
L M N P R S T U V
LS4 M
(NO)
LS4
(NC)
A B C G1 G2 X Y Z
A B C D E F G H J K
A B C D E F G H J K
1 2 3 4 5 6 7 8 9 10
LS2
(NC)
LS3 LS1
(NO) (NC)
"PT"
AA
BB
CC
DD
POTENTIAL SENSING TRANSFORMERS
AA
BB
CC
DD
EE
FF
GG
HH
J J
KK
1 2 3 4 5 6 7 8 9 10 11 12 13 1415 16 17 18 19 20 TB6
S CONTROL
TRANSFER SWITCH OPERATORS
!
1 2 3 4 5 6 7 8 9 10
LS3 LS2
(NC) (NO)
NOTE: FOR SINGLE-PHASE SENSING
JUMPER TERMINAL A TO B TO C AND
TERMINAL X TO Y TO Z ON TB2
L M N P R S T U V
L M N P R S T U V
SOURCE II
POTENTIAL
SENSING
TRANSFORMERS
500 VA MIN
120 VAC, 60 HZ
SECONDARIES
Z
C
1 2 3 4 5 6 7 8 9 10 11 12 13 1415 16 17 18 19 20 21 22
Y
SOURCE I AND SOURCE II MUST
PRESENT THE SAME PHASE
ROTATION TO THE LOAD.
N
B
SEE INSERT FOR
INTERNAL
CONNECTIONS
TYPE CI SWITCH
X
A B C D E F G
A B C D E F G
LOAD TAP
A
POTENTIAL
SENSING
TRANSFORMERS
500 VA MIN
120 VAC, 60 HZ
SECONDARIES
SOURCE I
N
TYPE CI SWITCH
SAFETY
FOR LIFE
S260-75-1
Figure 7.
Connection diagram for Type S load-transfer control operating the Type PST-6 switch. (The transformer cutouts, tap fuses,
reclosers, and arresters are not shown.)
11
12
TRIP
COIL
TB1
"SW"
CLOSE
COIL
TRIP
COIL
LS3 LS2
(NC) (NO)
LS3 LS1
(NO) (NC)
LS2
(NC)
LS4 M
(NO)
INTERNAL CONNECTION DIAGRAM:
C-INTERRUPTER # 1
R
LS4
(NC)
CLOSE
COIL
INTERNAL CONNECTION DIAGRAM:
C-INTERRUPTER # 2
GH J K L M
R
"PT"
EE
FF
GG
HH
A B C D E F
LS4 M
(NO)
LS4
(NC)
TB2
GG
HH
J J
KK
LL
MM
1 2 3 4 5 6 7 8 9 10
LS2
(NC)
LS3 LS1
(NO) (NC)
"PT"
AA
BB
CC
DD
A B C G1 G2 X Y Z
POTENTIAL SENSING TRANSFORMERS
11 15 14 13 16 G1 G2 26 23 24 25 21
1 2 3 4 5 6 7 8 9 10
LS3 LS2
(NC) (NO)
NOTE: FOR SINGLE-PHASE SENSING
JUMPER TERMINAL A TO B TO C AND
TERMINAL X TO Y TO Z ON TB2
NC = NORMALLY
CLOSED
NO = NORMALLY
OPEN
M = MOTOR
R = RESISTOR
KEY:
"SW"
AA
BB
CC
DD
EE
FF
S CONTROL
TRANSFER SWITCH OPERATORS
G H J K L M
G H J K L M
SOURCE II
POTENTIAL
SENSING
TRANSFORMERS
500 VA MIN
120 VAC, 60 HZ
SECONDARIES
Z
C
A B C D E F
A B C D E F
Y
SOURCE I AND SOURCE II MUST
PRESENT THE SAME PHASE
ROTATION TO THE LOAD.
N
B
SEE INSERT
FOR INTERNAL
CONNECTIONS
TYPE CI SWITCH
X
SEE INSERT FOR
INTERNAL
CONNECTIONS
TO
TO
TO
TPG2 TPG2 TPG2
A
POTENTIAL
SENSING
TRANSFORMERS
500 VA MIN
120 VAC, 60 HZ
SECONDARIES
SOURCE I
N
TYPE CI SWITCH
LOAD TAP
TO
TO
TO
TPG1 TPG1 TPG1
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
Figure 8.
Connection diagram for Type S load-transfer control operating the Type PST-9 switch. (The transformer cutouts, tap fuses,
reclosers, and arresters are not shown.)
!
S260-75-1
SAFETY
FOR LIFE
Interconnecting Cables
Interconnecting cable conductor size is dependent
upon the distance between the control, switches, and
potential transformers. Maximum lengths of various cable
combinations for No. 18 through No. 12 AWG conductors
are shown in Table 2. The longest combination for
the particular installation will determine the minimum
conductor size. All cables are to be the same conductor
size.
Note: If the control is equipped with the fault block accessory,
see Table 3 for additional cable length limitations.
On the switch end, the cables are wired to connector
plugs provided as standard with the switches. On the S
control end, the cables are wired either directly to terminal
blocks in the control or to connector plugs provided with
the Plugs and Receptacles accessory. Figure 9 shows
the location of the accessory plugs and receptacles in
the bottom of the control cabinet. See the appropriate
switch installation manual for the location of the plugs
and receptacles on the switch.
Switch Cable
Potential Transformer Cable
A four-conductor cable is required between the S control
and the potential transformers to transmit source voltage
intelligence and to supply operating power for the control.
This cable is wired to a five-pin socket plug or TB2 at
the control end. Pin socket identification, cable OD, and
maximum conductor size accommodated by the plugs
are shown in Figure 12.
Note: Connectors are not supplied for the transformer end of
the cable.
TABLE 2
Maximum Control Cable Lengths
A
VIEWA-A
RUBBERGROMMET
ACCOMMODATES
1/2"TO5/8"DIA.CABLE
A
MAX.WIRESIZE–NO.16AWG
Figure 10.
Switch cable plug for VR, VLR, VRV, and TSC.
PST-68,7,&19PINRECEPTACLES
PST-98&19PINRECEPTACLES
KEYWAY
PININSERTCONNECTIONSINTOCONTROL
PINF
A
A G
B
H F
C
D E
L MA
K U N B
J T V P C
H S R D
G F E
A F
B G E
C D
A
VIEWA-A
HV
SW
2
S CONTROL
020079KM
PININSERTCONNECTIONSINTOCONTROL
8PIN7PIN19PIN
LOAD
HV
SW
1
B
KEYWAY
PINF
A conductor cable is required between the S control and
each high-voltage switch to operate the switches. This
cable is wired to a socket plug at the switch end and to
either a plug or TB1 at the control end. Pin identification,
and cable OD and maximum conductor size accommodated by the plugs are shown in Figures 10 and 11.
A
Figure 9.
Plugs and receptacles accessory. Figure 11.
Switch cable plugs for PST-6 and PST-9.
D
C
KEYWAY
SOCKETINSERT–CONNECTSINTOCONTROL
SOCKETE
Maximum Length of
Cable Wire Control Cable Combinations (ft.)
Size VR, VLR, or VRV Switches TSC Switch
(AWG) A+B+D or C+B+D A+B or A+D
or C+B or C+D
18
1450
1250
16
2300
2000
14
3700
3200
12
5900
5050
Note: The control cable lengths are not applicable for the C switch and the PST switch.
A
A
MAX.WIRESIZE–NO.12AWG
RUBBERGROMMET
ACCOMMODATES
3/8"TO1/2"DIA.CABLE
Figure 12.
PT cable plug.
13
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
Fault Block Shielded Cable
Table 3 shows the maximum distance between the control
and the high-voltage switches for a range of conductor
sizes and fault-block settings. The table is based on
conductor voltage drop and saturation of the current
sensing transformers in the switch. Lower actuating levels
and lower multipliers could allow longer lines. However,
the limitation on switch control cable lengths, Table 2,
preclude their use.
Shielded cable is required between the transfer switches
and the S control for operating the fault block accessory.
IMPORTANT: Only shielded cable is to be used on
fault block accessory and is mandatory to validate
the Cooper Power Systems warranty. Use of a nonshielded cable could result in misoperation.
The shield must be grounded to the equipment housing at
both the switch and control ends. Shield connections are
made at connector plug pin or socket as shown in Figure
13. This pin mates with the receptacle pin or socket which
is grounded in the switch and in the control as shown in
Figures 6 and 8.
KEYWAY
Max. Distance in Feet
Phase Between Switch and
Actuating Con- S Control
Current ductor
Level Size For X 8 For X 6 For X 4
(Amps) (AWG) Multi- Multi- Multi
plier plier plier
640
18
600
1000
1800
640
16
950
1600
2900
640
14
1500
2550
4600
640
12
2400
4000
7300
448
18
1100
1700
–
448
16
1800
2700
–
448
14
2800
4300
–
448
12
4500
6850
–
320
18
1800
–
–
320
16
2900
–
–
320
14
4600
–
–
320
12
7300
–
–
SOLDER#16AWGJUMPERWIRE
FROMSHIELDTOPINGTO
COMPLETESHIELDCONNECTION
KEYWAY
PING
TABLE 3
Fault Block Cable Limitations
SOCKETA
A
SWITCHEND
Figure 13.
Fault block cable plug.
14
CONTROLEND
A
STRIPJACKETTOEXPOSESHIELDING
RUBBERGROMMET
ACCOMMODATES
.50TO.56DIA.CABLE
!
S260-75-1
SAFETY
FOR LIFE
5
6
7
8
4
9
10
3
2
11
1
12
13
14
15
Figure 14.
Type S control front panel.
020076KM
TABLE 4
Description and Use of Operating Controls and Indicators
Index No.
Figure 2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Description
OURCE PREFERENCE AND RETURN MODE
S
Switch (S4) (See Note A)
SOURCE I ENERGIZED lamp
OPERATION SELECTOR Switch (S3)
PREFERRED TO ALTERNATE TIMER
SWITCH I OPEN and CLOSED lamps
LAMP TEST switch (S6)
LATCH RELAY STATUS TEST terminals (T1—T2—T3)
SWITCH II OPEN and CLOSED lamps
ALTERNATE TO PREFERRED TIMER
MANUAL OPER. SOURCE I and MANUAL OPER.
SOURCE II switches (S1 and S2)
SOURCE II ENERGIZED lamp
CONTROL MODE switch (S5)
FAULT-BLOCK OPERATED lamp
RESET switch (S7)
Fuses
Purpose and Use
Selects either Source I (PREF I) or Source II (PREF II) as the preferred source, or no preference (NO PREF). Also selected parallel (P) or non-parallel (NP) return mode.
Indicates all three phases of Source I are energized.
Programs control for either AUTOmatic or MANUAL operation.
Determines time delay before transfer to alternate source when preferred source voltage is lost.
Indicates status of Source I high voltage switch.
Tests all indicating lamps on front panel.
Provides electrical access to both sides of latch relay to
determine if control is in Source I or Source II mode.
Indicates status of Source II high voltage switch.
Determines the time delay before transfer to preferred source when preferred source voltage is restored.
Provides means to OPEN and CLOSE Source I and Source II
transfer switch upon manual command, when S3 is in MANUAL position.
Indicates all three phases of Source II are energized.
Blocks automatic return transfer to preferred sources (HOLD ON ALTERNATE); also enables control to be operated without operating the high voltage transfer switches (TEST).
Indicates fault-block has operated (part of fault-block accessory).
Resets the control after a fault block operation (part of fault-block accessory). S3 must be in MANUAL position.
Voltage input of all three phases of both Source I and Source II
are fused for 10A-125 vac; white button shows on front of fuse if fuse blows.
Note A — Tab provided to lock switch knob in set position; stop screw prevents inadvertent selection of parallel return transfer mode.
15
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
OPERATING INSTRUCTIONS
DANGER: Hazardous voltage. Contact with
hazardous voltage will cause death or severe personal
injury. Follow all locally approved safety procedures
when working around high- and low-voltage lines and
equipment.
G103.3
WARNING: Hazardous voltage. Never rely on
the open position of the operating handle or the
contact position indicator; it does not ensure that the
line is deenergized. Follow all locally approved safety
practices. Failure to comply can result in contact with
high voltage, which wil cause death or severe personal
injury.
G123.1
IMPORTANT: Before energizing the installation,
an understanding of the functions of the operating
controls and indicating lights is essential. (Refer to
Table 4 and Figure 14.)
Initial Operation
To place the automatic transfer scheme into service,
proceed as follows:
CAUTION: Equipment misoperation. Source I and
Source II high voltage switches can be paralleled in the
manual operation mode even if SOURCE PREFERENCE
switch, S4, is set for NP (non-parallel operation). Make
sure both sources are in synchronism if a manual
parallel operation is to be performed. Failure to comply
can result in misoperation (unintended operation) and
equipment damage. T304.0
16
1. The switches on the front panel should be positioned
as follows:
A. S1 (MANUAL OPER. SOURCEI) — OFF
B. S2 (MANUAL OPER. SOURCE II) — OFF
C. S3 (OPERATlON SELECTOR) — MANUAL
D. S4 (SOURCE PREFERENCE AND RETURN
MODE) — set to the desired mode of operation.
E. S5 (CONTROL MODE) — NORMAL
2. Set the PREFERRED TO ALTERNATE TIMER and
ALTERNATE TO PREFERRED TIMER as required. (See
Time Delay section in this manual.)
3. Check that all installation connections are complete as
shown in the appropriate connection diagram Figures
5 through 8.
4. Make sure both high-voltage transfer switches are
open.
5. With all six fuses in place, energize both power sources
to the control.
A. SOURCE I ENERGIZED lamp should be on.
B. SOURCE II ENERGIZED lamp should be on.
C. SWITCH I OPEN lamp should be on.
D. SWITCH II OPEN lamp should be on.
6. Depending upon which source is the preferred source,
momentarily operate either S1 or S2 to the CLOSE
position. The appropriate switch will close to energize
the load and its status indicating lights will transfer from
OPEN to CLOSED.
7. Place the OPERATION SELECTOR SWITCH (S3) to
AUTO. The S control is in service. No further operation
will occur until the preferred source voltage is lost.
!
S260-75-1
SAFETY
FOR LIFE
Out Indicator
Timer Settings
IMPORTANT: Put control in manual mode prior to
changing timer setting. There is no fault current
protection when in manual mode. Failure to comply
can cause unintended operation.
The two digital timers are identical. One timer controls
the time required to transfer from the preferred source
to the alternate source, the other timer controls the time
to transfer from the alternate source to the preferred
source.
OUT Indicator
OUT
Digital Time
Display
3.45
39 4
9 5
999
S
Normal Operation
The control will react to ongoing line voltage conditions
and operate automatically as programmed. If equipped
with the fault block accessory, transfer to the alternate
source may be prevented when loss of voltage is due to a
load-side fault. See Fault Block Operating Instructions
section for procedure to restore service.
THEORY OF OPERATION
—BASIC S CONTROL
Refer to Figures 16 and 17 for the following sections:
Thumb-Wheel
Time Setting
Decimal Point
Indicator
Time Range
Selector
Figure 15.
Digital Timer and Time Ranges.
The out indicator briefly lights to signal completion of a
timing interval and confirm that the timer has operated.
The two digital timers feature the following informational
indicators and adjustment controls:
Digital Time Display
LED displays the time count. The timer counts up until it
reaches the time delay setting of the thumbwheel switch.
Time Range Selector
The time range selector switch can be set to six different
positions with a flat screwdriver. Each position indicates
a time range. See chart below. The time range selector is
preset to the time range of 0.1 to 99.9 seconds.
9.9999.999999.999999.9
Indication
S
S
S
M
M
H
Time
Range
0.01
to
9.99
sec
0.1
to
99.9
sec
1
to
999
sec
0.1
to
99.9
min
1
to
999
min
0.1
to
99.9
hours
Voltage Sensing
The S control will transfer the load to an alternate source
when one or more phases of the preferred source is lost,
provided normal voltage is present on all three phases of
the alternate source. To perform this function, the control
requires three-phase, low-voltage (120 Vac) input from
both the preferred and alternate sources of power. Input
from Source I is connected to terminals A, B, C and G1 of
TB2, and input from Source II is connected to terminals
X, Y, Z and G2.
Each of the three input phase leads for both Source I and
Source II is shunted to ground by a capacitor–varistor
combination to provide surge protection to the control. On
the preferred source side of the voltage sensing circuitry,
the input lines then pass through 10 Amp fuses to the
voltage sensing relays: R2 (Phase A), R9 (Phase B) and
R10 (Phase C). R9 and R10 are connected directly to the
input while N.O. contacts of R9 and R10 are in series with
the R2 coil. Thus, R2 can be energized only if all three
incoming phase voltages are above a predetermined value
(approximately 97 volts). A similar arrangement is used for
the alternate source sensing relays. R6 can be energized
only if R7 and R8 are energized. The transfer bus across
the top of the schematic diagram), which provides the
operating power for the control is normally energized from
Phase Y. If R7 drops out, due to loss of Phase Y, R11 will
be energized from Phase B (through N.C. contact of R7)
to re-energize the transfer bus. The contacts of R7 and
R11 are so connected that the transfer bus can never be
simultaneously energized from both B and Y phases.
Thumbwheel Time Setting
IMPORTANT: Thumb-wheel time setting must be
securely turned. Incomplete setting may cause timer
malfunction and control misoperation.
Set the desired time delay setting by rotating the
thumbwheel switch. For example, if the thumbwheel
time setting is 345 the timer will time out in 34.5 seconds
based off the time range selector setting of 0.1 to 99.9
seconds.
Note: The thumb-wheel time setting, which does not turn
infinitely, should not be turned beyond the limit.
17
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
Automatic Transfer, Preferred to
Alternate
The following assumptions are made:
• OPERATION SELECTOR switch (S3) is in AUTO.
• SOURCE PREFERENCE and RETURN MODE
switch (S4) is in PREF l-P (Terminal 2 of each deck
connected).
• CONTROL MODE switch (S5) is in NORMAL.
• S control is in a quiescent state.
• Source I high-voltage transfer switch (SW-I) is closed
and Source II high voltage transfer switch (SW-II) is
open.
Note: The actuators of both high-voltage transfer
switches are shown in the switch open position on
the schematic diagram. Following each opening
operation, the motor recharges the actuator springs
and the cutout switch returns to the position shown
in the schematic. However, when the high voltage
transfer switch is closed, the selector switch of the
actuator mechanism is opposite to that shown in the
schematic.
If one or more phases of the preferred source (Source I)
are lost, R2 will drop out and the SOURCE I ENERGIZED
lamp (L1) will go out. N.C. contacts 1-7 of R2 close
completing the circuit to the PREFERRED TO ALTERNATE
TlMER (TM1) through 4-7 of R6 (which is energized), 74 of R1, and deck J of S4. When TM1 times out, its 56 contacts close to energize the coil of R1 in the reset
direction causing R1 to transfer. Diodes in the circuit of
this single-coil magnetically held relay determine whether
“latching” or “resetting” occurs.
The transfer of R1 energizes the trip coil of Source I highvoltage transfer switch (SW-I) as follows:
Transfer bus voltage passes through terminals 5-1 of S3,
contact 9-3 of energized R1, and terminals 4-3 of S5. It
is then impressed on N.C. contact 7-2 of R4 and passes
through deck B of S4 to output terminal 13 of TB-1.
Terminal 13 is connected to the internal selector switch
in the actuator of SW-I (which is closed when SW-I is
closed), through the trip coil to ground (terminal G).
After SW-I has opened, the selector transfers to connect
terminal 3 to terminal 4, which energizes terminal 16 of
TB1. In turn contacts 2-6 of S3, deck C of S4, and terminal
25 of TB-1 are energized to operate the close coil of SW-II
and close the switch.
SW-I will now remain open and SW-II closed until Source
I voltage is restored.
Return Transfer, Parallel Transition
When Source I power is restored on all three phases, R2
will pick up and Source I Energized lamp (L1) will light.
Contact 9-6 of R2 closes to energize ALTERNATE TO
PREFERRED TIMER (TM-2) through contact 8-2 of R1,
and deck K of S4. After TM2 times out, its contacts 5-6
close to energize the coil of R1 through diode DL in the
latching direction causing R1 to transfer.
18
The transfer of R1 energizes the close coil of SW-I as
follows:
Transfer bus voltage passes through terminals 5-1 of S3,
contacts 9-6 of latched R1, and terminals 5-6 of S5. It is
then impressed on N.C. contact 7-2 of R5 and passes
through deck A of S4 to output terminal 15 of TB-1. This
activates the close coil in SW-I. When SW-I closes, its
auxiliary contact “a” closes to energize R5 (via TB1-24
and deck E of S4). Contact 7-5 of R5 closes to energize
TB1-23 through deck D of S4. Voltage at TB1-23 will
actuate the trip coil of SW-II to open the Source II highvoltage transfer switch.
Note: The Source I high-voltage switch (SW-I) closes before
the Source II high-voltage switch (SW-II) opens to effect
a parallel return transition. SW-I will now remain closed
and SW-II open until Source I voltage is lost or a change
of control settings is made.
Return Transfer, Non-Parallel
Transition
The following assumptions are made:
• SOURCE PREFERENCE and RETURN MODE
switch (S4) is in PREF l-NP (Terminal 3 of each deck
connected).
• Source I has lost one or more phases and the load has
been transferred to Source II as previously described
(SW-I open and SW-II closed).
• Control is in a quiescent state with latching relay R1
in the reset position (contacts 9-3 and 8-2 closed)
and R2 is deenergized.
When Source I power is restored on all three phases,
R2 will pick up, closing its contact 9-6, and energize
the ALTERNATE TO PREFERRED TIMER (TM-2) through
contact 8-2 of R1, and deck K of S4. After TM-2 times out,
its 5-6 contact closes to energize the coiI of R1 through
diode DL in the latching direction causing R1 to transfer,
closing its 6-9 contact.
In this case, the trip coil of SW-II is immediately energized
through the following circuit:
Terminals 5-1 of S3, N.C. contact 9-6 of R1, terminals 5-6
of S5, N.C. contact 7-2 of R5, and deck D of S4 to output
terminal TB1-23 to activate the trip coil of SW-I I and open
to Source II high-voltage transfer switch.
When SW-II opens, its selector switch transfers to
impress the voltage at TB1-23 onto TB1-26 which, in turn,
energizes TB1-15 through terminals 3-7 of S3 and deck A
of S4. Voltage at TB-15 will actuate the quick-close coil of
SW-I to close the Source I high-voltage switch.
Note: In this instance, the Source II high voltage switch (SWII) opens before the Source I high voltage switch closes,
to effect a non-parallel return transition. SW-I will now
remain closed and SW-II open until Source I voltage is
lost or a change is made in the control settings.
!
S260-75-1
SAFETY
FOR LIFE
No Preference Mode
Manual Control
Assume the Source I high-voltage switch (SW-I) is
closed and Source II high-voltage switch is open. With
the SOURCE PREFERENCE and RETURN MODE switch
(S4) in NO PREF-NP (Terminal 4 of S4 connected), loss
of Source I voltage on one or more phases will open the
Source I high-voltage switch (SW-I) as described in the
Automatic Transfer, Preferred to Alternate section of this
discussion.
When the OPERATION SELECTOR switch (S3) is placed
in MANUAL, it connects the MANUAL OPER. SOURCE I
switch (S1) and the MANUAL OPER. SOURCE II switch
(S2) to the transfer bus. Power can then be supplied
to either the close or trip coils of either SW-I or SW-II.
Contacts 3-7 and 2-6 of S3 are opened in the MANUAL
position so that opening of one high-voltage transfer
switch does not cause automatic closing of the other. In
the manual mode of operation, it is possible to have both
high-voltage switches open, either switch closed, or both
switches closed.
Upon restoration of Source I voltage, R2 is re-energized.
However, due to the positioning of decks G and H of
S4, neither timer can be energized since both the N.C.
contacts 1-7 of R2, and 9-3 of R6 are open (both relays
are energized).
The S control is now in a quiescent state with SW-II
closed and SW-I open. This condition will continue until
either Source II is lost or a change is made in the control
settings. If Source II is lost, delay in transfer to Source I
will be timed by TM-2.
Preferred Source II Mode
With the SOURCE PREFERENCE and MODE switch (S4)
in either PREF II-P (Terminal 6 of S4 connected), or PREF
II-NP (Terminal 5 of S4 connected) the description of
operation is similar to the “Automatic Transfer, Preferred
to Alternate” and “Return Transfer, Parallel Transition” or
“Return Transfer, Non-Paralleled Transition” as previously
described except that Source II is the preferred source
(controlled by SW-II) and Source I is the alternate source
(controlled by SW-I).
Indicating Lamps
The LAMP TEST switch (S6) is provided for checking
the various incandescent indicators on the front panel
of the S control. In the closed position, all the lamps will
be energized through a diode network to check their
condition.
In the open position, the diode network isolates the lamps
from the test switch so that it has no effect on normal
circuit operation.
Control Mode Switch, S5
If S5 is placed in the center-off TEST position, there
is no circuit to either the close or trip coils of either highvoltage transfer switch. This position of S5 is used to
check sensing circuitry, timers, and the latching relay
without affecting the status of the high-voltage switches.
If S5 is placed in the HOLD ON ALTERNATE position,
return transfer will not occur after preferred source voltage
is restored. Assume the S3 is in AUTO, S4 is in PREF l-P,
and the S control is in the quiescent state with Source
I high-voltage (SWI) closed and Source II high-voltage
switch (SW-II) open. Upon loss of Source I, R2 will again
initiate a transfer of the latching relay R1 as previously
described, followed by the opening of SW-I and the
closing of SW-2. The S control is now in a quiescent state
in which SW-2 will remain closed and SW-I will remain
open even when Source I power is restored. When Source
I is reenergized, R1 will transfer back to the latch position
and close its contact 9-6. However, because deck L of S4
is open, power cannot be provided to the trip coil of SW-II
or the close coil of SW-I.
19
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
TROUBLESHOOTING—BASIC S CONTROL
CAUTION: Equipment misoperation. Do not
energize this equipment until all control settings
have been properly programmed and verified. Refer to
the Control Programming and Operation section of this
manual for programming procedures. Failure to comply
can result in misoperation (unintended operation),
equipment damage, and personal injury.
G118.1
Warning: Hazardous voltage. Solidly ground all
equipment. Failure to comply can result in death,
severe personal injury, and equipment damage.
T223.2
General
This troubleshooting guide is intended to assist in
localizing problems that may be encountered in the
operation of the load-transfer scheme. After the problem
area has been localized, general troubleshooting and
circuit tracing techniques can be used to pinpoint
the cause. A fundamental understanding of the basic
operation is essential in carrying out these troubleshooting
procedures. (See Theory of Operation section.)
Schematic diagrams, Figures 16 and 17, are used as references throughout this guide. The physical location
of the various circuit components and terminals are
identified in Figure 27.
Remove the Control from Service
DANGER: Hazardous voltage. Contact with
hazardous voltage will cause death or severe personal
injury. Follow all locally approved safety procedures when
working around high and low voltage lines and equipment. G103.3
The following warning only applies to controls
equipped with the Fault Block Accessory:
WARNING: Hazardous Voltage. De-energize
switchgear before attempting to disconnect
control cable from control. Failure to do so may result
in contact with high voltage pulse (300V peak) from the
CT protection circuit. Failure to de-energize switchgear
can result in contact with high voltage, which will cause
death or severe personal injury.
G124.0
1. De-energize Source I and Source II voltage.
2. Disconnect cables from the control.
20
Basic Troubleshooting
A quick check of the basic transfer operation while the
control is in service can be made using the following
procedure:
Source I or Source II Preferred Operation
1. Set CONTROL MODE switch (S5) to TEST. This
wilI remove the control from service and allow it to
operate without operating the high-voltage transfer
switches.
2. Check LATCH RELAY STATUS TEST terminals
(T-1, T-2) to ground (T-3). 120 Vac at T-1 indicates the
control is in Source I mode; 120 Vac at T-2 indicates
the control is in Source II mode. Check if this agrees
with the SOURCE PREFERENCE switch setting.
3. Remove preferred source voltage by unscrewing one
of the phase fuses from the applicable source. The
PREFERRED TO ALTERNATE TIMER will start.
4. When the timer runs out, the latch relay (R1) will
transfer; indicated by a transfer of the 120 Vac signal
at the test terminals.
5. Replace the removed fuse to re-energize the preferred
source. The ALTERNATE TO PREFERRED TIMER will
start.
IMPORTANT: If Control Mode Switch S5 is placed
in the “Normal” position, the S-control will place the
high-voltage transfer switches into the configuration
that is currently selected by the Source Preference
Switch S4. This may result in an unintended transfer.
Make sure the desired state of the high-voltage
transfer switches match the setting of S4 before
returning S5 to the “Normal” position.
6. When the timer runs out, the latch relay (R1) will
transfer back to its original operating position.
7. Return the CONTROL MODE switch (S5) to NORMAL
to return the control to service.
!
S260-75-1
SAFETY
FOR LIFE
No Preference Operation
1. Set CONTROL MODE switch S5 to the TEST position.
This will remove the control from service and allow
operation without operating the high-voltage transfer
switches.
2. Check the setting of the SOURCE PREFERENCE
switch (S4). It should be in the center No Preference
position.
3. Check LATCH RELAY STATUS TEST terminals (T-1, T2) to ground (T-3). 120 Vac at T-1 indicates the control
is in the Source I mode. 120 Vac at T-2 indicates the
control is in the Source II mode.
4. Remove source voltage by unscrewing one of
the phase fuses from Source I if T-1 is energized
or from Source II if T-2 is energized. If a Source I
fuse is removed, the PREFERRED TO ALTERNATE
TIMER will start. If a Source II fuse is removed, the
ALTERNATE TO PREFERRED TIMER will start.
5. When the timer runs out, the latch relay (R1) will
transfer as indicated by a transfer of the 120 Vac
signal at the test terminals.
6. Replace the removed fuse to re-energize the power
source. No timers will start and latch relay (R1) will
not transfer.
7. Unscrew one of the phase fuses from the other source.
If a Source II fuse is removed, the ALTERNATE TO
PREFERRED TIMER will start. If a Source II phase
fuse is removed, the PREFERRED TO ALTERNATE
TIMER will start.
8. When the timer runs out, the latch relay (R1) will
transfer back to its original operating position, again
indicated by a transfer of the 120 Vac signal at the
test terminals.
Indicating Lamps
Although not essential to control operation, the indicating
lamps provide useful operating information. All lamps are
120 Vac operated half-wave through diodes.
For a quick check of the lamp diodes, depress the LAMP
TEST switch, S6. The two OPEN and two CLOSE lamps
should glow with equal brilliance, the green appearing
slightly less intense, and the SOURCE I ENERGIZED and
SOURCE II ENERGIZED lamps should noticeably increase
in brilliance (these lamps are energized from two phases,
120 degrees apart, instead of a single bus).
Note: The OPEN lamp circuit includes the impedance of the
close coil or motor of the high-voltage switch actuator.
Verification of Fuses
Fuses can be checked on the front panel of the control.
If the fuses are blown and require replacement, the white
buttons on the front panel will show. Refer to item 15 in
Figure 13 and Table 4.
Advanced Troubleshooting
IMPORTANT: The control should be removed
from service prior to conducting the advanced
troubleshooting procedures.
Use the output of the control procedure to determine if the
problem lies in the control or the high-voltage switches.
If the conditions of the output procedure are satisfactory,
test the high-voltage switch. If the conditions of the
output procedure are unsatisfactory, test the manual
control functions. If the conditions of the manual control
functions procedure are satisfactory, test the automatic
control functions.
9. Replace the removed fuse to re-energize the power
source. No timers will start and latch relay (R1) will
not transfer.
10. Place the CONTROL MODE switch (S5) to the normal
position. If switch S5 is left in the TEST position,
the S control will be inoperative on automatic
operation.
21
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
Output of the Control
TABLE 5
Continuity Check of High-Voltage Switches
Switch Ohmmeter Reading
Receptacle
Pin Switch Open Switch Closed
Type VR, VLR, VRV — Standard Operator
B to C
B to D
B to E
D to F
Motor
∞
∞
0
∞
Trip Coil
0
0
Type VR, VLR, VRV — Quick Close Operator
A to D
B to C
B to D
B to E
D to F
*
Quick Close Coil
∞
∞
0
∞
∞
Trip Coil
0
0
Motor
∞
∞
∞
0
∞
∞
0
Motor
∞
Type TSC**
B to C
B to F
B to E
D to B
D to F
Type PST-6 with C Interrupter #1
E to R
M to N
P to E
S to V
T to U
Close Coil
∞
*
0
∞
∞
0
∞
∞
Trip Coil
Type PST-6 with C Interrupter #2
B to C
D to E
E to F
G to K
H to J
∞
*
Close Coil
0
∞
0
∞
∞
∞
Trip Coil
Type PST-9 with C Interrupter #1
E to F
A to C
C to E
B to C
C to D
∞
∞
∞
∞
∞
Type PST-9 with C Interrupter #2
L to M
G to J
J to L
H to J
J to K
∞
0
∞
*
Close Coil
0
∞
Trip Coil
∞
∞
* Will read motor resistance if closing spring is not charged,
will read infinity if closing spring is charged.
** The manual lockout level must not be pulled down during
the test.
22
To determine if the problem is in the control or the highvoltage transfer switch, proceed as follows:
1. Disconnect the switches from the control.
2. Place OPERATION SELECTOR switch (S3) to
MANUAL.
3. Place SOURCE PREFERENCE and RETURN MODE
switch (S4) to NO PREF.
4. With the control energized, check the voltage to
ground at the “Transfer Switch Operators” terminal
board, TB1, per Table 6.
5. If these output voltages are obtained, check the
high-voltage switch. If the output voltages are not
obtained, check the manual control functions.
High-Voltage Switch
Normal control output at TB1 but failure to operate
suggests a malfunctioning switch.
1. With an ohmmeter, check the resistance between
points of the high-voltage switch actuator per
Table 5.
2. If the control circuit of the switch operator checks
out, the trouble may be mechanical. Refer to the
maintenance manual for the switch.
!
S260-75-1
SAFETY
FOR LIFE
Manual Control Functions
Automatic Control Functions
Abnormal output readings at TB1 indicate a malfunctioning control. This procedure describes the terminal
functions under manual direction and suggests areas for
investigation.
The control may operate properly by manual direction but
malfunction in its automatic mode. The automatic section
responds to the positions of R2 and R6 in conjunction with
the selected operating mode as set on S4, the SOURCE
PREFERENCE and RETURN MODE switch. Its output is
the single-coil latching relay, R1.
1. Terminals 11 and 21 provide the power to charge
the springs in the switch actuator and are constantly
energized. If terminals 11 and 21 are not energized,
the transfer bus is not energized.
1. R2 is energized from phase A of Source I through N.O.
contacts of R9 in phase B and R10 in phase C. The
action of R2 can be observed through its transparent
cover and can be checked electrically across tabs 31
and 32 on the relay tie board which connect to a N.C.
contact of the relay.
A. Make sure that either phase B of the preferred
source or phase Y of the alternate source is
energized. These phases supply the transfer bus.
Measure beyond the fuses.
2. R6 is similarly energized from phase X of Source II
through R7 in phase Y, and R8 in phase Z. Tabs 41
and 42 connect to a N.C. contact of R6.
B. Relays R7 and R11 control power to the transfer
bus. Relay R7 picks up when phase Y is energized;
Relay R11 picks up if phase B is energized and
phase Y is deenergized.
3. Operation of the appropriate time delay relay can
be checked by verifying that the LED timer is
illuminated.
2. Terminals 15 and 25 provide 120 Vac closing power
(15 closes Source I switch, and 25 closes Source
II switch). Terminals 13 and 23 provide 120 Vac
opening power (13 opens Source I switch and 23
opens Source II switch).
4. The single-coil latching relay (R1) is electrically
operated and magnetically held. It is latched directly
from the 120 Vac transfer bus through diode DL in the
automatic mode or diode DL1 in the manual mode.
It is reset through the 15 K ohm resistor and either
diodes DR or DR1.
A. Terminals 13, 23, 15 and 25 are energized from
the transfer bus through the MANUAL OPER.
switches, S1 and S2.
5. With the control in an automatic mode of operation,
the position of the latching relay can be determined
at the Latching Relay Test jacks (T1, T2, T3) on the
front panel of the control.
(1) If the control is equipped with the fault block
accessory, normally closed contacts of the fault
block relay (RY1) are connected between tabs
FP and FR of the relay tie board to complete
the circuit to terminal 15 and between tabs FS
and FT to complete the circuit to terminal 25.
A. When 120 Vac is present between T1 and T3, the
relay is in the “latched” position and the control
seeks to connect the load to Source I.
(2) If the control does not use the fault block
accessory, jumpers are provided between tabs
FP and FR and FS and FT of the relay tie board
to complete the closing power circuits to the
transfer switches.
3. Terminals 14 and 24 are grounded
by an “a” contact (N.O.) in the
H.V. transfer switches to energize
relays R4 and R5 respectively
during the “opening” half of a
parallel return transfer.
4. Terminals 16 and 26 are
energized (120 Vac) on the
“closing” half of a non-parallel
return transfer. They are
energized from a “b” contact
(N.C.) in the H.V. transfer
switches; 16 is energized from
Source I high- voltage switch
and 26 is energized from
Source II high-voltage switch.
B. When 120 Vac is present between T2 and T3,
the relay is in the “reset” position and the control
seeks to connect the load to Source II.
C. If the latching relay assumes the expected position
after the proper time delay, the automatic section
of the control is functioning properly.
TABLE 6
Voltage Readings on TB1
Voltage to Ground
MANUAL OPER. MANUAL OPER.
Term SOURCE I SOURCE II
on Switch (S1) Switch (S2)
TB1 Quiescent Close Open Close Open
11 120 Vac 120 Vac 120 Vac 120 Vac 120 Vac
15 170 Vdc* 120 Vac 170 Vdc* 170 Vdc* 170 Vdc*
14 170 Vdc* 170 Vdc* 170 Vdc* 170 Vdc* 170 Vdc*
13 0
0
120 Vac 0
0
16 0
0
0 0
0
26 23 24 25 21 0
0
170 Vdc* 170 Vdc* 120 Vac 0
0
170 Vdc* 170 Vdc* 120 Vac 0 0 170 Vdc* 170 Vdc* 120 Vac 0
0
170 Vdc* 120 Vac 120 Vac 0
120 Vac
170 Vdc*
170 Vdc*
120 Vac
* Rectified 120 Vac impressed on capacitor. Drops to 0 if LAMP TEST switch (S6) is depressed.
23
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
Figure 16a.
Schematic diagram basic S control operating Types VR, VLR, VRV, TSC, or PST-9 switchgear (page 1 of 2).
24
!
SAFETY
FOR LIFE
S260-75-1
Figure 16b.
Schematic diagram basic S control operating Types VR, VLR, VRV, TSC, or PST-9 switchgear (page 2 of 2).
25
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
Figure 17a.
Schematic diagram for Type S control operating Type PST-6 switchgear (page 1 of 2).
26
!
SAFETY
FOR LIFE
S260-75-1
Figure 17b.
Schematic diagram for Type S control operating Type PST-6 switchgear (page 2 of 2).
27
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
FAULT BLOCK ACCESSORY
(Applicable to VR, VLR, VRV, TSC, CS, and PST-6 switchgear.)
To prevent the fault block accessory from being activated
due to inrush current that may occur as a result of the
backup opening and closing, an inrush restraint feature is
built into the accessory logic. Upon loss of the preferred
source voltage, the inrush restraint operates to increase
the phase fault actuating level by a predetermined
multiple for a predetermined time after voltage is restored.
Simultaneously, ground fault current detection is blocked
completely for the same time interval. When the time runs
out, both the phase and ground current actuating levels
return to their normal values.
The fault block accessory is mounted in the upper right
corner of the back panel of the control, Figure 18. Controls
and instructions for operating the accessory are located
on the front panel above the input fuses, Figure 19.
General Description
In response to fault current above preselected phase or
ground levels, the accessory is activated and latched
to disable both high-voltage switches. Thus a load-side
fault followed by loss of potential will result in partial load
transfer opening the connected source but not closing
the faulted load into the alternate feeder.
To operate the fault block accessory, the Source I and
Source II high-voltage switches must be equipped
with 1000:1 ratio current transformers to monitor the
magnitude of the line current and an auxiliary “a” contact.
The bushing current transformers and associated wiring
are provided as a factory-installed accessory to the highvoltage switch.
The accessory must be manually reset at the control panel
to restore service to the load. If activation of the fault block
accessory is due to a temporary fault (preferred source
voltage is restored before the transfer delay timer runs
out), line current of 5 Amps, or more, flowing through the
high-voltage switch will automatically reset the accessory
in approximately 10 to 15 seconds.
Accessory Settings
ACTUATING LEVEL PRINTED
CIRCUIT CARD (FIGURE 18)
TERMINAL BLOCK FOR
EXTERNAL CONNECTIONS
RAISED FAULT LEVEL
DURATION TIMER
Figure 18.
Fault block accessory mounted in upper-right corner of the back panel. 020080KM
The selected phase and ground
fault actuating levels should be
greater than any peak load phase
current or zero-sequence (ground)
current, but less than the trip
setting of the backup protective
device. A general recommendation is to set the phase and ground
actuating levels to approximately
80% of the phase and ground trip
levels of the backup.
The phase fault current minimum
actuating level is determined
by a plug-in circuit card, Figure
20. Cards are available for 80,
112, 160, 224, 320 and 448 Amp
actuating levels. The ground fault
current minimum actuating level is
determined by a resistor cartridge
that clips on to the phase card.
Cartridges are available for 10,
14, 20, 28, 40, 56, 80, 112, 160,
224, 320 and 448 Amp actuating
levels.
INSTRUCTION LABEL
Provides instructions
for resetting the
fault block accessory.
RESET SWITCH (S7)
Reactivates the S control
after a fault block operation.
Figure 19.
Fault block accessory controls and operating instructions plate.
28
FAULT BLOCK
OPERATED SWITCH
Indicates that the fault block
accessory has operated.
020077KM
!
S260-75-1
SAFETY
FOR LIFE
The actuating level multiplier for the inrush restraint feature
for phase faults is set by a jumper wire connected to a tab
on the circuit card. Tabs are provided for X1, X2, X4, X6,
X8 and BLOCK settings. The duration of the raised level is
set by a knob on the top of the timer (Figure 18). The timer
is infinitely adjustable 0.1 to 5.0 seconds. No settings are
required for ground inrush since it is automatically blocked
for the duration the phase level is raised.
Operating Instructions
The FAULT BLOCK OPERATED lamp on the front panel
of the control, Figure 19, will light when the fault block
accessory is activated. To reset the accessory:
1. Move the OPERATION SELECTOR switch (S3) to
MANUAL.
2. Depress and hold the RESET switch (S7) until the lamp
goes out, (approximately 6-10 seconds) indicating the
accessory has reset.
3. To restore service, return the OPERATION SELECTOR
switch (S3) to AUTOMATIC; the preferred source high
voltage switch will close.
OR
Operate either the MANUAL OPER. SOURCE I switch (S1) or the MANUAL OPER. SOURCE II Switch (S2), as applicable, to restore service manually.
Note: Instructions for operating the fault block accessory
also are printed on the front panel of the control (Figure
19).
PHASE CURRENT LEVEL
MULTIPLIER SETTING FOR INRUSH
CURRENT RESTRAINT.
Theory of Operation
—Fault Block Accessory
The fault block accessory prevents automatic closure into
the alternate source when loss of preferred source results
from a fault on the load tap. The schematic diagram for
the fault block accessory, Figure 21, is used as reference
throughout this discussion.
Overcurrent Sensing
The output of bushing current transformers in both the
Source I and Source II high voltage switches are applied
to the fault block accessory via terminals lA, IB, IC, IN and
IX, IY, IZ, IN respectively. When the load current through
the switch exceeds the phase or ground actuating level
selected, the relay contacts in the fault block accessory
(contacts 7-8 and 10-11 of relay RY1-B), located in the
closing circuits of both high voltage switches, are opened.
Subsequent closing of either switch is blocked in either
the automatic or manual mode of the S control until the
fault block accessory circuitry is reset.
Phase Fault Operation
Referring to the accessory schematic diagram, Figure
21, the phase currents are rectified by the diode bridges
D103 through D116. Current out of the positive side of the
bridge passes through diode D127 and divides into two
parallel circuits. One circuit consists of zener D123 and
the minimum phase actuating resistor R301 to the other
side of the bridge. The other circuit consists of normally
closed contact (1516) of latching relay RY1, diode D201,
and capacitor C201 to the other side of the bridge. C201,
charged by load or fault current, provides tripping energy
for RY1.
The current through R301 produces a voltage drop
proportional to the line current which is impressed across
the series resistor string R101, R102, and R103. A portion
of this voltage is applied through diode D120 to the base
of transistor Q201.
When this voltage exceeds the break-down voltage of
zener D212 and the base emitter junctions of Q201 and
Q202, Q201 will conduct causing Q204 to conduct. In
turn, Q204 provides the gating current to turn on the SCR
(Q206) to discharge capacitor C201 through the trip coil
of the latching relay RY1. Contacts 10-11 and 7-8 of RY1
(in series with the close coils of the high voltage switches)
open to prevent the high voltage switches from closing
until the fault block circuitry is reset.
GROUNDACTUATING
CURRENT
RESISTOR
CLIPS TO THE
PHASE CARD
020078KM
Figure 20.
Phase fault current actuating level printed circuit card.
An important feature of this accessory is that a trip signal
cannot be initiated until there is sufficient charge on C201
to activate the trip coil of RY1. Transistors Q201 and
Q204, effectively in series across C201, cannot conduct
until the voltage across C201 is sufficient to break-down
zener diodes D211 and D212.
29
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
SOURCE I
H.V. SWITCH
AØ
BØ
CØ
AØ
BØ
CØ
SOURCE II
H.V. SWITCH
PART OF
RESISTOR BOARD
GROUND ACTUATING
RESISTOR
R306
a2 SOURCE II
H.V. SWITCH
a1
SOURCE I
H.V. SWITCH
Figure 21a.
Schematic diagram – fault block accessory (page 1 of 2).
30
+
!
S260-75-1
SAFETY
FOR LIFE
MANUAL
S3
V103
TRIP RESET BOARD
RY1
17
16
D201
D
15
N
F
D203
B
D
H
C210
0.1
R211
100K
R218
1K
C204
3.0
V
+
Q204
2N2905
D201
D211
6.8V
1N4736A
Q201
+
R216
47K
R210
1K
+
R204
10K
R203
3.3K
A
C206
12
+
E
C203
5.6
Q206
C5V
+
C208
0.1
200V
C207
1.0
35V
R214
56K
R217
47K
S7
RESET
3PST
MOMENTARY
+
1
W
R202
470
2
TB4-3
120V IN MANUAL
TB4-4
4
TM1-2
4
TM1-3
5
6
TM2-3
RY1
RESET
COIL
C202
150
D207
T
1
3
TM2-2
Y
R215
47K
R206
68K
TB4-2
Q203
D208
R207
680K
FN
2
3
Q205
2N6119
C209
0.1
200V
N
1
2
C205
0.1
R213
1.8K
R205
100
R212
3.3MEG
AUTO
TB4-1
1
L7
RY1
2
TRIP
COIL
D209
R208
3.9K
18
C201
150
D202
Q202
D212
5.1V
1N4733A
11
(120V BUS)
8
RY1
12
R209
47K
4
M
14 D26
12
19
D206
D204
R201
6.8K-2W
RY1
RY1
11
P
FP
8
10
R
FR
S
FS
RY1
5
7
4
L
D205
G
FG
LEGEND
3
ACCESSORY TERMINAL BLOCK (TB5)
T
FT
U
W
V
ACCESSORY TIEBOARD TERMINAL
RELAY PIN (RY1 & RY2)
NO CONNECTIONS
NOTE
LATCH RELAY CONTACTS (RY1) SHOWN WITH
RESET COIL LAST ENERGIZED
UNLESS OTHERWISE NOTED:
DIODES ARE 1N4004
TRANSISTORS ARE 2N2102
RESISTORS ARE 1/2 WATT
RESISTOR VALUES ARE IN OHMS
CAPACITOR VALUES ARE IN MICRO-FARADS
EDGE CONNECTOR TERMINAL
(DIODE BOARD)
(RESISTOR BOARD)
(TRIP-RESET BOARD)
TAB ON RELAY BOARD OF S CONTROL
TB4 TERMINAL STRIP OF S CONTROL
S3 & S7 TERMINALS
TM1 (PREFERRED TO ALTERNATE TIMER) AND
TM2 (ALTERNATE TO PREFERRED TIMER) TERMINALS
Figure 21b.
Schematic diagram – fault block accessory (page 2 of 2).
31
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
Ground Fault Operation
Inrush Restraint Feature
The ground current (the vector sum of the phase currents)
flows through the ground actuating resistor, R306, to
produce a voltage across the primary of input transformer
TR1, proportional to the ground current. This voltage is
stepped-up, rectified, and impressed across the series
resistor string R104, R105, R106 and R107. A portion of
this voltage is applied to the base of Q201 through diode
D119. From this point, ground and phase operations use
common circuitry described in the preceding “Phase Fault
operation” discussion.
The inrush restraint feature raises the actuating level
of the fault block accessory by a multiple (or blocks its
operation entirely) for a period following restoration of
source voltage or an automatic open transition transfer
operation, to prevent inrush currents from activating the
fault block.
Reset Circuits
Once actuated, the fault block accessory can be reset in
either of two ways.
• Manually—Actuating the Reset Switch, S7, on the front
panel of the S control, will apply 120 Vac to terminal
G of the fault block accessory tie board. This voltage
is rectified by diode D205 and applied to the reset
timing circuit, which consists of R201, C206, and the
programmable uni-junction (PUT) Q205. This voltage
is also applied to capacitor C202, which provides
energy to the reset coil of latching relay RY1. When
the voltage across C206 reaches the break-down
voltage of the PUT, transistor Q203 is then turned on
causing C202 to discharge through the reset coil of
RY1. The relay transfers and the fault block accessory
is now reset.
Relay RY2 is normally energized by the phase B or phase
Y voltages from the S control via the “a” auxiliary contacts
in the two high-voltage switches. When both B and Y
phase voltages are lost due to operation of a backup
device or opening of the high-voltage switches, the coil
of RY2 is de-energized, closing its contacts. Contact 14 closes to insert a paralleling resistor across the phase
actuating resistor R301, reducing its effective value and
increasing the line current necessary to actuate Q201.
Contact 5-8 of RY2 closes to short-out the secondary of
TR1, rendering the ground section operative.
Upon re-energization of either Phase B or Phase Y through
closing of the backup devices or the closing of the highvoltage transfer switches, relay RY2 is energized. RY2 has
a built-in time delay programmable by means of a knob
in the top of the relay case. After the selected time delay
has elapsed, N.C. contacts 1-4 and 5-6 open, returning
the fauIt block accessory to normal operation.
Note: S7 is energized only when
the
Operation
Selector
switch is in MANUAL.
• Automatically—by load current
below the minimum actuating
level flowing through the highvoltage switch. The voltage
developed by the load current
is applied through contact 1617 of RY1 to the reset timing
circuit R207, C206, and Q205.
When the voltage across C206
reaches the breakdown voltage
of the PUT, Q203 is then turned
on causing C202 to discharge
through the reset coil of RY1.
The latching relay transfers
and the fault block accessory
is reset.
Note: If the load current is above
the actuating level of the
accessory, both manual and
automatic reset is defeated
by Q202 which conducts to
short-out the reset timing
capacitor C206 through
resistor R205.
32
Figure 22.
Test circuit for testing and troubleshooting the fault block accessory.
!
S260-75-1
SAFETY
FOR LIFE
Testing Fault Block Operation
WARNING: Hazardous voltage caused by
backfeeding of transformers. Isolate potential
transformers from source bushings using potential
transformer dead-break disconnect switches located
on the source-side panel. Failure to do so will result in
risk of possible contact with high voltage at the source
bushings, which may cause death or severe personal
injury.
T273.0
The operation of the fault block accessory can be checked
by backfeeding a 500:5 (or other available ratio) current
transformer, located in the primary loop of one phase of
the preferred source high-voltage switch, from a variable
120 Vac source. The 500:5 ratio provides approximately
1 Amp of output test current for every 10 mA of input
current. However, to eliminate error due to CT saturation,
a separate metering CT and meter should be used to read
the actual test current.
Test Circuit and Equipment
A suggested test setup is shown in Figure 22. If the control
is equipped with the plug and receptacle accessory, use
the existing cables to interconnect the motor operators of
both high-voltage switches and the CT sensing circuits of
the preferred source switch to the S control. If plugs and
receptacles are not provided, wire the switches directly
to the appropriate terminal blocks as shown in Figures 6
or 8.
1. Disable the ground sensing circuit by shorting the
ground fault resistor (Figure 22).
2. Set the inrush current multiplier at X1.
3. Close test circuit switches SW2 and SW3 to apply
voltage to the control.
The preferred source high-voltage switch (HV1) will close.
4. Close test switch SW1 and slowly raise the test
current until the FAULT BLOCK OPERATED light
goes on.
The test current should be within the limits specified in Table 7. If FAULT BLOCK OPERATED light fails to come on at the expected level, proceed as follows:
A. Check lamp with LAMP TEST switch (S6).
B. Recheck calculations for proper meter reading.
C. Is ground resistor cleanly shorted out?
D. Did latch relay R1 transfer position?—lamp is only
an outward indication of relay position.
E. Are all cable connections secure?
F. Voltage from Accessory Tie Board, Tab D to
Ground, Tab L, should be approximately 15 Vdc,
average, at actuating level. If observed voltage is
approximately 6 volts too low, trouble is probably in
the Trip Reset Board; if voltage is too high, trouble
is probably in either Diode or Resistor Boards.
G. AC rms voltage from “IN” to “IA” (or whatever
phase is energized) should be about 17 V at
actuating level. If correct voltage is observed, the
CT input is correct.
TABLE 7
Test Current Values for Fault Block Accessory
Figure 23.
Disabling ground sensing circuit.
020082KM
Test Procedure and Troubleshooting
Phase Minimum Actuating Current
Actuating
Current
Setting
(Amps)
Actuating Current Limits
(Amps)
Minimum
Maximum
10
14
20
28
40
56
80
112
160
274
320
448
9
12.6
18
25.2
36
50.4
72
101
144
247
250
403
11
15.4
22
50.8
44
61.6
88
123
176
301
352
493
IMPORTANT: When checking the phase minimum
actuating current the ground fault sensing portion
of the accessory must be disabled. Testing on an
individual phase basis without disabling ground fault
sensing will cause the accessory to activate at the
ground fault level.
33
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
5. Open SW1 and SW2 to simulate a backup clearing
the fault.
The PREFERRED TO ALTERNATE TIMER will start and the preferred source high-voltage switch (HV1) will open when the timer runs out, but the alternate source high-voltage switch (HV2) will not close.
If alternate source switch (HV2) closes and the latch relay (R1) contacts are not opening, check for open contact between Accessory Tie Board tabs P and R (Source I HV switch) and tabs S and T (Source II HV switch).
6. Place OPERATION SELECTOR SWITCH (S3) to
manual, and operate MANUAL OPER SOURCE I
switch (S1) and MANUAL OPER SOURCE II switch
(S2) to CLOSE.
HV switch (HV1 or HV2) will not close.
If either switch closes and the latch relay (R1)
contacts are not opening, check for open contact
between Accessory Tie Board tabs P and R (Source
I HV switch) and tabs S and T (Source II HV switch).
7. Close test switch SW2 to restore preferred source
voltage to the control. After the ALTERNATE TO
PREFERRED TIMER runs out, reset the fault block
accessory per instructions on the front panel.
10. Repeat step 8 and 9 for the other high-voltage switch
to complete checking all six CTs, their connections
and polarity.
11. Remove the shorting jumper from the ground fault
resistor upon completion of phase testing.
Ground Minimum Actuating Current
When checking the ground minimum actuating current,
the phase fault sensing portion of the accessory circuit
must be disabled to prevent the possibility of erroneous
test results. Proceed as follows:
1. Disable the phase sensing circuit by placing a shorting
jumper from the BLOCK tab on the phase resistor
card to tab L on the accessory tie-board (Figure 26).
2. Repeat steps 2 through 7 of the Phase Minimum
Actuating Current test procedure.
Automatic Reset of Fault Block
1. Close test switches SW2 and SW3 to supply voltage
to the control.
The preferred source high-voltage switch (HV1) will close.
2. Close SW1 and raise the test current until the FAULT
BLOCK OPERATED lamp lights indicating that fault
block has been activated.
The FAULT BLOCK OPERATED light will go out and the preferred source high-voltage switch will close.
3. Open SW2 to simulate the back-up device opening
and simultaneously open SW1 to clear the fault.
If the FAULT BLOCK OPERATED light does not go out, the problem is most likely in the TRIP RESET BOARD.
The PREFERRED TO ALTERNATE TIMER will start to run.
Follow steps 8 through 11 to conduct a complete check
involving all the phases of both high-voltage switches.
8. Connect the phases in series as shown in Figure 24
and retest.
Because of the series hook-up, pickup should occur at 1/2 the actuating current setting.
If pickup current is other than 1/2 of setting, the polarity of a CT could be reversed.
9. Connect another two phases in series as shown in
Figure 25 and retest.
4. Close SW2 to simulate reclosing of Source 1 backup
device. Quickly close SW1 and raise the test current
to greater than 5 Amps but less than ground actuating
level.
The FAULT BLOCK OPERATED lamp will go out
in about 10-15 seconds indicating the accessory
has reset.
If FAULT BLOCK OPERATED lamp does not go out,
the trouble is most likely in the Trip-Reset board
(assuming the previous tests had passed).
Results should be the same as in preceding step 8.
A
JUMPER
A
JUMPER
Figure 24.
Test Connections for Step 8.
34
Figure 25.
Test Connections for Step 9.
!
S260-75-1
SAFETY
FOR LIFE
Inrush Restraint
The inrush-restraint feature prevents inrush currents above
the minimum actuating level from actuating the accessory.
This is accomplished by raising the phase actuating level
by some multiple for a predetermined time after service is
restored. Ground actuating level detection is blocked for
the duration of the raised phase actuating level. Proceed
as follows:
1. Disable the ground sensing circuit by shorting the
ground fault resistor (Figure 26).
2. Set the inrush-restraining multiplier on the phase
actuating card and the raised fault-level duration on the
timer to the values at which they are to be checked.
3. With the preferred source high-voltage switch (HV1)
closed, close test switch SW1 and raise the equivalent
test current to a value above the maximum actuating
level for the setting, but below the multiplied setting.
(See Table 7 for maximum current test values.)
4. Without disturbing this current setting, open SW1.
5. Close test circuit switches SW2 and SW3 to apply
voltage to the control.
6. Momentarily close and open SW1 before the raised
duration timer runs out, to simulate an inrush current.
The FAULT BLOCK OPERATED lamp will not light.
If the FAULT BLOCK OPERATED lamp does light, proceed as follows:
A. Recheck current calculations. (Test current should
exceed actuation level but be less than inrush
level.)
B. Check if momentary faults were applied before
timer elapsed.
C. Check if timing relay picked up after either HV1 or
HV2 was closed. Check presence or absence of
120 Vac at Accessory Tie Board terminal 17 when
HV1 operates and terminal 28 when HV2 operates.
D. Check for trouble in delay relay contacts or resistor
board.
7. Close SW1 and leave closed to simulate a permanent
fault on the load side.
The FAULT BLOCK OPERATED lamp will light after the
raised duration timer runs out.
If FAULT BLOCK OPERATED lamp does not light, the problems are similar to step 6 above.
8. Open switches SW2 and SW3 to remove voltage from
the accessory.
9. Raise the test current to a value just above the raised
multiple value.
10. Without disturbing this current setting, open SW1.
11. Again close switches SW2 and SW3 to apply voltage
to the control.
12. Close SW1 to simulate a high-level fault on the load
side of the switch.
The FAULT BLOCK OPERATED lamp will light
immediately indicating the fault is greater than the inrush current restraining setting.
If FAULT BLOCK OPERATED lamp does not light immediately, then
A. Recalculate expected current.
B. Verify that jumper on resistor board is on correct
tab.
If FAULT BLOCK OPERATED lamp still does
not light immediately, the resistor board may be
defective. Contact your Cooper Power Systems
representative.
13. Remove the shorting jumper from the ground fault
actuating cartridge upon completion of the test.
“BLOCK” TAB
“L” TAB
Figure 26.
Disabling phase sensing.
020083KM
Return the Control to Service
CAUTION: Equipment misoperation. Do not
energize this equipment until all control settings
have been properly programmed and verified. Refer to
the Control Programming and Operation section of this
manual for programming procedures. Failure to comply
can result in misoperation (unintended operation),
equipment damage, and personal injury.
G118.1
CAUTION: Equipment misoperation. Source I and
Source II high voltage switches can be paralleled in the
manual operation mode even if SOURCE PREFERENCE
switch, S4, is set for NP (non-parallel operation). Make
sure both sources are in synchronism if a manual
parallel operation is to be performed. Failure to comply
can result in misoperation (unintended operation) and
equipment damage.
T304.0
1. The control must be programmed with all the
necessary operating settings and verified by the
appropriate personnel prior to operation with
energized switchgear.
2. Verify status of high voltage switches according to
system requirements.
3. Reconnect cables and ground the control.
4. Apply Source I and Source II voltage to the control.
35
A
36
Figure 27.
Location of circuit components wiring terminal identification.
5
4
1
2
TM2
3
6
S5
1
2
A
1
2
6
3
2 1 8 7
2
S2
1
2
5
L5
5
6
7
8
TB3
S3
2
6
3
T1
3 5
S7
2 4 6
1
1 2 3 4
TB4
1
2
3
4
T3
4 3 21
1 2 3 4
9
10
11
12
L7 1
4
1
T2
12 11 10 9
8 7 6 5 S6
TM1
2
5 4 3
C S4
6
1
2
1
2
L1
L3
2 1 8 7
S1 41
5
1
2
3 4 5 6
L4
1
2
FU
X
Y
W U S P M 17 28
IA IB IC IX IY IZ G D IN
FU–A
A B C G1 G2 X Y Z
TB2
A
11 15 G 14 13
B
FAULT BLOCK ACCESSORY
FB – FAULT BLOCK TIE BOARD
TB5 – FAULT BLOCK TERMINAL BOARD
S7 – RESET SWITCH
L7 – FAULT BLOCK OPERATED LAMP
S4 – SOURCE PREFERENCE
– RETURN MODE SWITCH
S5 – CONTROL MODE SWITCH
S6 – LAMP TEST SWITCH
L1 – SOURCE I ENERGIZED LAMP
L2 – SOURCE II ENERGIZED LAMP
L3 – SWITCH I – OPEN LAMP
L4 – SWITCH I – CLOSED LAMP
L5 – SWITCH II – OPEN LAMP
L6 – SWITCH II – CLOSED LAMP
A
C
Z
V T R N L
2 1
2 1
FU–B
FU–C
2 1
FU–X
2 1
FU–Y
2 1
2 1
FU–Z
16 26 23 24 25 21
11 15 14 13 16 G1 G2 26 23 24 25 21
J4
J1
ABCXYZ
FG FS FT 12 II R R1 L L1 35 22 45
J3
J2
X
Y
Z
TB1
R
A
W
FN FP FR 31 32 44 43 41 I 42 33 34
5
D
4
11
M
K
B
C
A
G
J
P
FB
17 18 IA IB IC IN IN IX IY IZ 27 28
TB5
The physical location of the
circuit components and their
terminals identification are
shown in Figure 27.
3 4 5 6
L6
G
11
L6
L5
L4
L3
Tables 36–40 apply to S
Controls with the Fault Block
Accessory.
L2
D
Tables 21 through 40 identify
the point-to-point wiring
between circuit components.
A – SURGE PROTECTOR CIRCUIT BOARD
D – DIODES CIRCUIT BOARD
R – RELAY TIE BOARD
TB1 – TRANSFER SWITCH OPERATORS TERMINAL BLOCK
TB2 – POTENTIAL SENSING TRANSFORMERS TERMINAL BLOCK
TB3 – INTERMEDIATE TERMINAL STRIP
TB4 – INTERMEDIATE TERMINAL STRIP
TM1 – PREFERRED TO ALTERNATE TIMER
TM2 – ALTERNATE TO PREFERRED TIMER
T1-T2-T3 – LATCH RELAY STATUS TEST JACKS
FU – PHASE FUSES
S1 – MANUAL OPER – SOURCE I SWITCH
S2 – MANUAL OPER – SOURCE II SWITCH
S3 – OPERATION SELECTOR SWITCH
I
17
II
14
25
24
15
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
WIRING TABLES
!
S260-75-1
SAFETY
FOR LIFE
TABLE 8
TABLE 10
TABLE 12
“A”
Surge Protector Circuit Board
TB1
Output Terminal Block
From
To
Color
TB1-G2
WHT
G1
Screw on
WHT
Back Panel
G2
TB1-G1
WHT
TB2-G2
WHT
R-1
BLK
11
TB1-21
BLK
A-11
BRN
S1-3
BLK
13
A-13
YEL
R-47
BLK
14
S4(F-C)
RED
A-14
ORG
R-FR
BLU
15
D-15
BLU
A-15
RED
16
S3-2
YEL
A-16
GRN
21
TB1-11
BLK
A-21
BLK
23
S2-3
WHT
A-23
VIO
24
S4(E-C)
BRN
A-24
GRY
R-FT
GRN
25
A-25
WHT
D-25
GRN
26
S3-3
ORG
A-26
BLU
From
1
2
3
4
From
A
B
C
G
X
Y
Z
11
13
14
15
16
21
23
24
25
26
To
FU-A-1
FU-B-1
FU-C-1
Stud on
Cabinet
FU-X-1
FU-Y-1
FU-Z-1
TB1-11
TB1-13
TB1-14
RA(B-7)*
TB1-15
TB1-16
TB1-21
TB1-23
TB1-24
RA(A-7)*
TB1-25
TB1-26
Color
BRN
ORG
GRN
WHT
VIO
WHT
BRN/WHT
BRN
YEL
ORG
ORG
RED
GRN
BLK
VIO
GRY
GRY
WHT
BLU
TABLE 9
“D”
Diodes Circuit Board
From
To
Color
I
S6-1
RED
II
S6-10
BRN
G
S6-7
BRN
L3
L3-2
BRN
L4
L4-2
RED
L5
L5-2
ORG
L6
L6-2
YEL
L7
TB4-1
ORG
11
S6-5
RED
14
S4(F-C)
YEL
15
TB1-15
BLU
24
S4(E-C)
GRN
25
TB1-25
GRN
TABLE 11
TB2
Input Terminal Block
From
To
Color
A
FU-A-1
RED
B
FU-B-1
YEL
C
FU-C-1
BLU
G1
C-2
WHT
TB2-G2
WHT
G2
TB1-G2
WHT
TB2-G1
WHT
X
FU-X-1
GRY
Y
FU-Y-1
BLK
Z
FU-Z-1
RED/WHT
TB3
Terminal Strip
To
TM2-8
S6-4
TM2-7
S4(K-8)
TM1-7
S4(J-4)
TM1-8
S6-4
Color
Motor Lead
YEL
Motor Lead
WHT
Motor Lead
GRY
Motor Lead
GRN
TB4
Terminal Strip
To
D-L7
R-FN
L7-1*
T3
L7-2*
S3-8*
S1-2
S7-1*
R-FG
S7-2*
Color
ORG
GRN
BRN
BRN
RED
ORG
BRN
BRN
YEL
RED
TABLE 13
From
1
2
3
4
* Fault Block Accessory Connections
TABLE 14
FU-A
Source I – Phase A Fuse
From
To
Color
1
A-A
BRN
TB2-A
RED
2
R-A
BRN
TABLE 15
FU-B
Source I – Phase B Fuse
From
To
Color
1
A-B
ORG
TB2-B
YEL
2
R-B
RED
TABLE 16
FU-C
Source I – Phase C Fuse
From
To
Color
1
A-C
GRN
TB2-C
BLU
2
R-C
ORG
37
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
TABLE 17
TABLE 22
TABLE 23
FU-X
Source II – Phase X Fuse
From
To
Color
1
A-X
VIO
TB2-X
GRY
2
R-X
YEL
“R” Relay Tie Board
From
To
Color
S5 CONTROL MODE Switch
From
To
Color
1
S4(L-6)
RED
2
S4(M-8)
GRN
3
R-4
RED
4
T-2
ORG
5
T-1
RED
6
R-5
BRN
TABLE 18
FU-Y
Source II – Phase Y Fuse
From
To
Color
1
A-Y
WHT
TB2-Y
BLK
2
R-Y
GRN
TABLE 19
FU-Z
Source II – Phase Z Fuse
From
To
Color
1
A-Z
BRN/WHT
TB2-Z
RED/WHT
2
R-Z
BLU
TABLE 20
TM1
PREFERRED TO ALTERNATE TIMER
From
To
Color
1
R-33
ORG
TM2-6
ORG
2
TB3-4
BLK
3
R-R
YEL
TM2-8
YEL
4
–
–
5
–
–
R-43
BRN
6
TM2-1
BRN
S7-8*
BLU
7
TB3-3
BLK
TB2-3
RED
8
R-L
RED
S7-7*
GRN
* Fault Block Accessory Connections
TABLE 21
TM2
ALTERNATE TO PREFERRED TIMER
From
To
Color
1
TM1–6
BRN
2
TB3-1
BLK
3
TM1-8
RED
4
–
–
5
–
–
6
TM1-1
ORG
S7-4*
ORG
7
TB3-2
BLK
8
TM1-3
YEL
S7-5*
YEL
* Fault Block Accessory Connections
38
A
B
C
D
G
J
K
L
L1
M
P
R
R1
W
X
Y
Z
FG
FN
FP
FR
FS
FT
J1
J2
J3
J4
I
II
4
5
11
12
22
31
32
33
34
35
41
42
43
44
45
47
48
FU-A-2
FU-B-2
TB-5-18*
FU-C-2
S4(B-8)
TB2(G-1)
T-3
FB-L*
S4(F-12)
S4(D-8)
TM1-3
S1-4
S4(D-12)
S4(B-12)
TM1-6
S2-4
S4(E-2)
FU-X-2
FU-Y-2
TB5-27*
FU-Z-2
TB4-4
FB-G*
TB4-1
FB-N*
S4(A-C)
R-FR**
FB-P*
TB1-15
R-FP**
FB-R
S4(C-C)
R-FT**
FB-S*
TB1-25
R-FS**
FB-T*
BRN
RED
BRN
ORG
ORG
WHT
ORG
RED
GRY
BLU
RED
BLU
RED
YEL
YEL
VIO
VIO
YEL
GRN
RED
BLU
YEL
BRN
GRN
YEL
BRN
BLK
GRN
BLU
BLK
BLU
GRN
BLK
VIO
GRN
BLK
GRY
Used with capacitor
voltage sensing accessory
S6-3
S6-12
S5-3
S5-6
S3-5
TB1-11
FB-M*
L3-1
S3-1
S4(G-6)
S4(G-2)
TM1-5
S4(J-C)
S4(L-C)
S4(H-8)
S4(H-12)
TM1-2
S4(K-C)
S4(M-C)
TB1-13
S4(C-6)
* Fault Block Accessory Connections
** Omit jumpers if fault block included.
BRN/WHT
GRY
RED
BRN
RED
BLK
ORG
VIO
BRN
BLK
WHT
ORG
ORG
GRN
BRN/WHT
RED/WHT
BRN
YEL
BLU
BLK
GRY
TABLE 24
S6 LAMP TEST Switch
From
To
Color
1
D-I
RED
2
L1-1
BRN
3
R-I
BRN/WHT
T-3
ORG
4
TB3-4
GRN
TB3-1
YEL
5
D-11
RED
6
–
–
7
D-G
BRN
8
SW3-5
BLU
9
–
–
10
D-II
BRN
11
L2-1
RED
12
R-II
GRY
TABLE 25
L1 SOURCE I ENERGIZED Lamp
From
To
Color
1
S6-2
BRN
2
L2-2
ORG
TABLE 26
L2 SOURCE II ENERGIZED Lamp
From
To
Color
1
R-II
GRY
2
L1-2
ORG
T3
YEL
TABLE 27
L3 SWITCH I OPEN Lamp
From
To
Color
1
R-12
VIO
L4-1
VIO
2
D-L3
BRN
TABLE 28
L4 SWITCH I CLOSED Lamp
From
To
Color
1
L5-1
VIO
L3-1
VIO
2
D-L4
RED
!
S260-75-1
SAFETY
FOR LIFE
TABLE 30
TABLE 29
From
A-C
A-2
A-3
A-4
A-5
A-6
B-C
B-8
B-9
B-10
B-11
B-12
C-C
C-2
C-3
C-4
C-5
C-6
D-C
D-8
D-9
D-10
D-11
D-12
E-C
E-2
F-C
F-12
G-C
G-2
G-3
S4 SOURCE PREFERENCE & RETURN MODE Switch
To
Color
From
To
Color
R-FP
BRN
G-4
R-32
WHT
S1-1
BRN
G-5
R-31
BLK
R-38
VIO
G-6
H-C
S3-5
VIO
S4(G-C)
Bare
H-8
R-41 BRN/WHT
H-9
S1-3
ORG
H-10
H-11
R-42 RED/WHT
R-D
ORG
H-12
J-C
R-34
ORG
J-2
S4(K-12)
Bare
R-P
YEL
J-3
R-FS
GRN
J-4
S4(K-12)
Bare
S2-1
YEL
TB3-3
GRY
J-5
S4(K-10)
Bare
J-6
K-C
R-44
YEL
K-8
TB3-2
WHT
R-48
GRY
K-9
S2-3
BLU
K-10
S4(J-6)
Bare
R-K
BLU
K-11
S4(J-2)
Bare
K-12
R-M
RED
L-C
R-35
GRN
L-2
–
–
L-3
–
–
D-24
GRN
L-4
TB1-24
BRN
L-5
S5-1
RED
R-W
VIO
L-6
D-14
YEL
M-C
R-45
BLU
TB1-14
RED
T-2
BRN
R-J
GRY
M-8
S4(H-C)
Bare
M-9
S5-2
GRN
R-32
WHT
M-10
L5
SWITCH II OPEN Lamp
From
To
Color
1
L6-1
VIO
L4-1
VIO
2
D-L5
ORG
TABLE 31
L6
SWITCH II CLOSED Lamp
From
To
Color
1
L5-1
VIO
2
D-L6
YEL
TABLE 32
S1
MANUAL OPER. SOURCE I Switch
From
To
Color
1
S3-7
VIO
S4(A-C)
BRN
S2-2
RED
2
TB4-3
BRN
S1-5
Bare
3
TB1-13
BLK
S4(B-C)
ORG
4
R-L1
BLU
S2-6
YEL
5
S1-2
Bare
6
S2-4
YEL
TABLE 33
T1-T2-T3
LATCH RELAY STATUS TEST Terminal
From
To
Color
T1
S4(L-C)
RED
S5-5
RED
T2
S4(M-C)
BRN
S5-4
ORG
L2-2
YEL
T3
S6-4
ORG
TB4-2
BRN
R-G
ORG
39
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
TABLE 34
TABLE 36
TABLE 38
S2
MANUAL OPER. SOURCE II Switch
From
To
Color
1
S4(C-C)
YEL
S3-6
BLU
S1-2
RED
2
S2-5
Bare
S3-9
GRN
3
TB1-23
WHT
S4(D-C)
BLU
4
R-R1
VIO
S1-6
YEL
5
S2-2
Bare
6
S1-4
YEL
“FB”
Fault Block Accessory Tie Board
From
To
Color
IA
TB5-IA
BRN
IB
TB5-IB
RED
IC
TB5-IC
ORG
IX
TB5-IX
YEL
IY
TB5-IY
GRN
IZ
TB5-IZ
BLU
G
R-FG
BRN
D
S3-12
BLK
IN
TB5-IN
VIO
W
–
–
U
–
–
S
R-FS
VIO
P
R-FP
GRN
M
R-11
ORG
RA(A-2)
BLK
17
TB5-17
GRY
28
TB5-28
WHT
V
–
–
T
R-FT
GRY
R
R-FR
BLU
N
R-FN
YEL
L
R-G
RED
“TB5”
Fault Block Accessory
Terminal Block
From
To
Color
17
FB-17
GRY
RA(A-1)
GRN
18
R-B
BRN
RA(A-6)
BRN
IA
FB-IA
BRN
IB
FB-IB
RED
IC
FB-IC
ORG
IN1
FB-IN
VIO
IN2
BLK
IN2
IN1
BLK
IX
FB-IX
YEL
IY
FB-IY
GRN
IZ
FB-IZ
BLU
27
R-Y
RED
RA(B-6)
RED
28
FB-28
WHT
RA(B-1)
WHT
TABLE 35
S3
OPERATION SELECTOR SWITCH
From
To
Color
1
R-22
BRN
2
TB1-16
YEL
3
TB1-26
ORG
4
–
–
R-11
RED
5
S4(H-C)
VIO
S6-8
BLU
6
S2-1
BLU
7
S1-1
VIO
8
TB4-2*
ORG
9
S2-2
GRN
10
–
–
11
–
–
12
FB-D*
BLK
TABLE 37
L7
FAULT BLOCK OPERATED
From
To
Color
1
TB4-1
BRN
2
TB4-2
RED
* Fault Block Accessory Connections
TABLE 39
S7
Fault Block RESET Switch
From
To
Color
1
TB4-3
BRN
2
TB4-4
RED
4
TM2-6
ORG
5
TM2-8
YEL
7
TM1-8
GRN
8
TM1-6
BLU
TABLE 40
“RA”
Fault Block Accessory Relay
From
To
Color
A1
TB5-17
GRN
A2
FB-M
BLK
A6
TB5-18
BRN
A7
A-24
GRY
B1
TB5-28
WHT
B6
TB5-27
RED
B7
A-14
ORG
REPLACEMENT PARTS
Parts listed and illustrated include only those parts
and assemblies usually furnished for repair. Because
of the ease, faster receipt, and greater economy of
local acquisition, the wiring, wire end terminations, and
common hardware parts are not included in the
replacement parts listing.
40
To assure correct receipt of any parts order, always
include the control type and serial number. Because of
Cooper Power Systems’ continuous improvement policy,
there may be instances where parts furnished may not
look exactly the same as the parts ordered.
However, they will be completely interchangeable without
any rework of the control. All parts carry the same warranty
as the original control, i.e., against failure due to defects
in material or workmanship within one year from date of
shipment.
!
S260-75-1
SAFETY
FOR LIFE
1, 2, 3, 5 1, 2, 3, 4 8 10 8 1, 2, 3, 5 1, 2, 3, 4
12
9
11
11
13
14
14
1, 2, 3, 6
1, 2, 3, 6
1, 2, 3, 7
15
22
16, 17
18, 19, 20
23
20, 21
Figure 28.
Front panel – replacement parts identification.
020076KM
Front Panel Replacement Parts List
Index
No.
Description
1 Lamp socket
2 Socket fastener
3 Lamp
4 Lens, red (L4, L6)
5 Lens, green (L3, L5)
6 Lens, clear (L1, L2)
7 Lens, amber (L7)
8 Terminal post, black (T1, T2)
9 Terminal post, white (T3)
10
Toggle switch, 4PST (S6)
11
Digital timer
(TM1, TM2)
0.01 sec. to 99.9 hrs. range
Catalog
Number
KP2361A1
KP2005A10
KP2276A3
KP2277A2
KP2277A5
KP2277A3
KP2277A4
KP2081A2
KP2081A1
KP2124A26
Qty.
6
6
6
2
2
2
1
2
1
1
KP2159A2
2
Index
Catalog
No.
Description
Number
Qty.
12 Diode circuit board assembly KCN120SA
1
13 Toggle switch, 4PDT (S3)
KP2124A16
1
14 Toggle switch, DPDT (S1, S2) KP2124A6
2
15 Intermediate terminal strip
(TB3, TB4)
KP432ME
2
16 Rotary selector switch (S4)
KCN199S
1
17 Switch knob
KCN149S1
1
18 Knob lock
KP107RS
1
19 Lock backing
KP497ME
1
20 Self tapping screw, K751515106050A
2
6-32 x 1/2, stl
1
21 Spacer
KP3004A59
22 Toggle switch, DPDT (35)
KP2124A21
1
23 Toggle switch, 3PST (S7)
KP2124A43
1
41
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
4, 6 2, 6 2, 6 7
2, 6
2, 6
3, 6
4, 6
3, 6
4, 6
1, 5
8
9
10
11, 12
020080KM
Figure 29.
Back panel – replacement parts identification.
Back Panel Replacement Parts List
42
Index
No.
Description
1
Relay (R1)
2
Relay (R8, R9, R10, R11)
3
Relay (R4, R5)
4
Relay (R2, R6, R7)
5
Relay retainer
6
Relay retainer
7
Relay tie board subassembly
8
Surge protector board assembly
9
Terminal block (TB2) (Consists
of the following components)
Terminal section
End piece
Marker strip
10 Terminal block (TB1) (Consists
of the following components)
Terminal section
End piece
Marker strip
11 Fuse holder
12 Fuse
Catalog
Number
KCN104S4
KCN104S2
KCN104S3
KCN104S1
K999904310339A
K999904310339A
KCN203S900
KNOVA322-1
Qty.
1
6
2
1
1
9
1
1
KP999904150097A
KP999904150064A
KP2076A50
12
1
1
KP999904150097A
KP999904150064A
KP2076A50
KP124S
KP125S
16
1
1
6
6
!
S260-75-1
SAFETY
FOR LIFE
12 13 11 6 4 5
14
15
2
7
10
8
9
3
1
Figure 30.
Fault block accessory – replacement parts identification.
020081KM
Fault Block Accessory Replacement Parts List
Index
No.
Description
1
Relay retainer bar
2
Circuit board retainer bar
3
Wing nut, 10-32, stl
4
Elastic stop nut
5
Phase actuating current circuit
board (add proper current value to
complete catalog number: 80, 112, 160,
224, 320, 448, 640)
6
Ground actuating current resistor
(add proper current value to complete
catalog number: 10, 14, 20, 28, 40, 56, 80,
112, 160, 224, 320, 448)
7
Diode board
8
Trip-reset board
9
Relay (RY1)
10 Time-delay relay (RY2)
11 Transformer
12 Zener diode
13 Tie board
14 Terminal block (TB5) (Consists of the
following components)
Terminal section
End piece Marker strip
15 Barrier
Catalog
Number
KCN144S1
KCN141S1
K881215332010Z
KP2020A1
KCN116S___
Qty.
1
1
1
1
1
KCN142S___
1
KCN114SA
KCN112SA
KP978ME
K999904310339A
KA234ME
KP4011A12
KCN110SA
1
1
1
1
1
1
1
1
KP999904150097A
KP999904150064A
KP2076A50
KCN167S1
16
1
1
1
43
Type S Automatic Load-Transfer Control Installation, Operation, and Maintenance Instructions
KA2048-291 Rev: 03
© 2008 Cooper US, Inc. All Rights Reserved.
All Cooper logos, Cooper Power Systems, and Kyle are valuable trademarks of
Cooper US, Inc. in the U.S. and other countries. You are not permitted to use the
Cooper Trademarks without the prior written consent of Cooper US, Inc.
2300 Badger Drive
Waukesha, WI 53188
www.cooperpower.com